kotlin-stdlib/kotlin.text/StringBuilder

StringBuilder

expect class StringBuilder(content: String) : Appendable, CharSequence(source)

A mutable sequence of characters.

String builder can be used to efficiently perform multiple string manipulation operations.

Since Kotlin

1.1
actual typealias StringBuilder = java.lang.StringBuilder(source)(source)

Since Kotlin

1.1
actual typealias StringBuilder = java.lang.StringBuilder(source)(source)

Since Kotlin

1.1

Constructors

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expect constructor()

Constructs an empty string builder.

expect constructor(capacity: Int)

Constructs an empty string builder with the specified initial capacity.

expect constructor(content: CharSequence)

Constructs a string builder that contains the same characters as the specified content char sequence.

expect constructor(content: String)
expect constructor()

Constructs an empty string builder.

expect constructor(capacity: Int)

Constructs an empty string builder with the specified initial capacity.

expect constructor(content: CharSequence)

Constructs a string builder that contains the same characters as the specified content char sequence.

expect constructor(content: String)

Constructs a string builder that contains the same characters as the specified content string.

Properties

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val CharSequence.indices: IntRange

Returns the range of valid character indices for this char sequence.

Since Kotlin 1.1
val CharSequence.indices: IntRange

Returns the range of valid character indices for this char sequence.

Since Kotlin 1.0
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val CharSequence.lastIndex: Int

Returns the index of the last character in the char sequence or -1 if it is empty.

Since Kotlin 1.1
val CharSequence.lastIndex: Int

Returns the index of the last character in the char sequence or -1 if it is empty.

Since Kotlin 1.0
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expect open override val length: Int

Returns the length of this character sequence.

Since Kotlin 1.1
expect open override val length: Int

Returns the length of this character sequence.

Since Kotlin 1.0

Functions

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inline fun CharSequence.all(predicate: (Char) -> Boolean): Boolean

Returns true if all characters match the given predicate.

Since Kotlin 1.0
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fun CharSequence.any(): Boolean

Returns true if char sequence has at least one character.

Since Kotlin 1.0
inline fun CharSequence.any(predicate: (Char) -> Boolean): Boolean

Returns true if at least one character matches the given predicate.

Since Kotlin 1.0
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expect fun append(value: Any?): StringBuilder

Appends the string representation of the specified object value to this string builder and returns this instance.

Since Kotlin 1.1
expect open override fun append(value: Char): StringBuilder

Appends the specified character value to this Appendable and returns this instance.

Since Kotlin 1.1
expect open override fun append(value: CharSequence?): StringBuilder

Appends the specified character sequence value to this Appendable and returns this instance.

Since Kotlin 1.1
expect open override fun append(value: CharSequence?, startIndex: Int, endIndex: Int): StringBuilder

Appends a subsequence of the specified character sequence value to this Appendable and returns this instance.

Since Kotlin 1.1
expect fun append(value: Any?): StringBuilder

Appends the string representation of the specified object value to this string builder and returns this instance.

Since Kotlin 1.0
expect open override fun append(value: Char): StringBuilder
expect open override fun append(value: CharSequence?): StringBuilder
expect open override fun append(value: CharSequence?, startIndex: Int, endIndex: Int): StringBuilder
Since Kotlin 1.0
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inline fun StringBuilder.append(obj: Any?): StringBuilder
Since Kotlin 1.1
fun StringBuilder.append(vararg value: Any?): StringBuilder
fun StringBuilder.append(vararg value: String?): StringBuilder

Appends all arguments to the given StringBuilder.

Since Kotlin 1.1
inline fun StringBuilder.append(obj: Any?): StringBuilder
Since Kotlin 1.0
fun StringBuilder.append(vararg value: Any?): StringBuilder
fun StringBuilder.append(vararg value: String?): StringBuilder

Appends all arguments to the given StringBuilder.

Since Kotlin 1.0
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fun Appendable.appendln(): Appendable

Appends a line separator to this Appendable.

Since Kotlin 1.0
fun StringBuilder.appendln(): StringBuilder

Appends a line separator to this StringBuilder.

Since Kotlin 1.0
inline fun Appendable.appendln(value: Char): Appendable
inline fun Appendable.appendln(value: CharSequence?): Appendable

Appends value to the given Appendable and line separator after it.

Since Kotlin 1.0
inline fun StringBuilder.appendln(value: StringBuffer?): StringBuilder
inline fun StringBuilder.appendln(value: StringBuilder?): StringBuilder
inline fun StringBuilder.appendln(value: Any?): StringBuilder
inline fun StringBuilder.appendln(value: Boolean): StringBuilder
inline fun StringBuilder.appendln(value: Byte): StringBuilder
inline fun StringBuilder.appendln(value: Char): StringBuilder
inline fun StringBuilder.appendln(value: CharArray): StringBuilder
inline fun StringBuilder.appendln(value: CharSequence?): StringBuilder
inline fun StringBuilder.appendln(value: Double): StringBuilder
inline fun StringBuilder.appendln(value: Float): StringBuilder
inline fun StringBuilder.appendln(value: Int): StringBuilder
inline fun StringBuilder.appendln(value: Long): StringBuilder
inline fun StringBuilder.appendln(value: Short): StringBuilder
inline fun StringBuilder.appendln(value: String?): StringBuilder

Appends value to this StringBuilder, followed by a line separator.

Since Kotlin 1.0
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fun CharSequence.asIterable(): Iterable<Char>

Creates an Iterable instance that wraps the original char sequence returning its characters when being iterated.

Since Kotlin 1.0
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fun CharSequence.asSequence(): Sequence<Char>

Creates a Sequence instance that wraps the original char sequence returning its characters when being iterated.

Since Kotlin 1.0
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inline fun <K, V> CharSequence.associate(transform: (Char) -> Pair<K, V>): Map<K, V>

Returns a Map containing key-value pairs provided by transform function applied to characters of the given char sequence.

Since Kotlin 1.0
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inline fun <K> CharSequence.associateBy(keySelector: (Char) -> K): Map<K, Char>

Returns a Map containing the characters from the given char sequence indexed by the key returned from keySelector function applied to each character.

Since Kotlin 1.0
inline fun <K, V> CharSequence.associateBy(keySelector: (Char) -> K, valueTransform: (Char) -> V): Map<K, V>

Returns a Map containing the values provided by valueTransform and indexed by keySelector functions applied to characters of the given char sequence.

Since Kotlin 1.0
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inline fun <K, M : MutableMap<in K, in Char>> CharSequence.associateByTo(destination: M, keySelector: (Char) -> K): M

Populates and returns the destination mutable map with key-value pairs, where key is provided by the keySelector function applied to each character of the given char sequence and value is the character itself.

Since Kotlin 1.0
inline fun <K, V, M : MutableMap<in K, in V>> CharSequence.associateByTo(destination: M, keySelector: (Char) -> K, valueTransform: (Char) -> V): M

Populates and returns the destination mutable map with key-value pairs, where key is provided by the keySelector function and and value is provided by the valueTransform function applied to characters of the given char sequence.

Since Kotlin 1.0
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inline fun <K, V, M : MutableMap<in K, in V>> CharSequence.associateTo(destination: M, transform: (Char) -> Pair<K, V>): M

Populates and returns the destination mutable map with key-value pairs provided by transform function applied to each character of the given char sequence.

Since Kotlin 1.0
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fun CharSequence.commonPrefixWith(other: CharSequence, ignoreCase: Boolean = false): String

Returns the longest string prefix such that this char sequence and other char sequence both start with this prefix, taking care not to split surrogate pairs. If this and other have no common prefix, returns the empty string.

Since Kotlin 1.1
fun CharSequence.commonPrefixWith(other: CharSequence, ignoreCase: Boolean = false): String

Returns the longest string prefix such that this char sequence and other char sequence both start with this prefix, taking care not to split surrogate pairs. If this and other have no common prefix, returns the empty string.

Since Kotlin 1.0
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fun CharSequence.commonSuffixWith(other: CharSequence, ignoreCase: Boolean = false): String

Returns the longest string suffix such that this char sequence and other char sequence both end with this suffix, taking care not to split surrogate pairs. If this and other have no common suffix, returns the empty string.

Since Kotlin 1.1
fun CharSequence.commonSuffixWith(other: CharSequence, ignoreCase: Boolean = false): String

Returns the longest string suffix such that this char sequence and other char sequence both end with this suffix, taking care not to split surrogate pairs. If this and other have no common suffix, returns the empty string.

Since Kotlin 1.0
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inline operator fun CharSequence.contains(regex: Regex): Boolean

Returns true if this char sequence contains at least one match of the specified regular expression regex.

Since Kotlin 1.1
operator fun CharSequence.contains(char: Char, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence contains the specified character char.

Since Kotlin 1.1
operator fun CharSequence.contains(other: CharSequence, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence contains the specified other sequence of characters as a substring.

Since Kotlin 1.1
inline operator fun CharSequence.contains(regex: Regex): Boolean

Returns true if this char sequence contains at least one match of the specified regular expression regex.

Since Kotlin 1.0
operator fun CharSequence.contains(char: Char, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence contains the specified character char.

Since Kotlin 1.0
operator fun CharSequence.contains(other: CharSequence, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence contains the specified other sequence of characters as a substring.

Since Kotlin 1.0
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inline fun CharSequence.count(): Int

Returns the length of this char sequence.

Since Kotlin 1.0
inline fun CharSequence.count(predicate: (Char) -> Boolean): Int

Returns the number of characters matching the given predicate.

Since Kotlin 1.0
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fun CharSequence.drop(n: Int): CharSequence

Returns a subsequence of this char sequence with the first n characters removed.

Since Kotlin 1.0
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fun CharSequence.dropLast(n: Int): CharSequence

Returns a subsequence of this char sequence with the last n characters removed.

Since Kotlin 1.0
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inline fun CharSequence.dropLastWhile(predicate: (Char) -> Boolean): CharSequence

Returns a subsequence of this char sequence containing all characters except last characters that satisfy the given predicate.

Since Kotlin 1.0
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inline fun CharSequence.dropWhile(predicate: (Char) -> Boolean): CharSequence

Returns a subsequence of this char sequence containing all characters except first characters that satisfy the given predicate.

Since Kotlin 1.0
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expect inline fun CharSequence.elementAt(index: Int): Char

Returns a character at the given index or throws an IndexOutOfBoundsException if the index is out of bounds of this char sequence.

Since Kotlin 1.0
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inline fun CharSequence.elementAtOrElse(index: Int, defaultValue: (Int) -> Char): Char

Returns a character at the given index or the result of calling the defaultValue function if the index is out of bounds of this char sequence.

Since Kotlin 1.0
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inline fun CharSequence.elementAtOrNull(index: Int): Char?

Returns a character at the given index or null if the index is out of bounds of this char sequence.

Since Kotlin 1.0
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fun CharSequence.endsWith(char: Char, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence ends with the specified character.

Since Kotlin 1.1
fun CharSequence.endsWith(suffix: CharSequence, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence ends with the specified suffix.

Since Kotlin 1.1
fun CharSequence.endsWith(char: Char, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence ends with the specified character.

Since Kotlin 1.0
fun CharSequence.endsWith(suffix: CharSequence, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence ends with the specified suffix.

Since Kotlin 1.0
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inline fun CharSequence.filter(predicate: (Char) -> Boolean): CharSequence

Returns a char sequence containing only those characters from the original char sequence that match the given predicate.

Since Kotlin 1.0
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inline fun CharSequence.filterIndexed(predicate: (index: Int, Char) -> Boolean): CharSequence

Returns a char sequence containing only those characters from the original char sequence that match the given predicate.

Since Kotlin 1.0
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inline fun <C : Appendable> CharSequence.filterIndexedTo(destination: C, predicate: (index: Int, Char) -> Boolean): C

Appends all characters matching the given predicate to the given destination.

Since Kotlin 1.0
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inline fun CharSequence.filterNot(predicate: (Char) -> Boolean): CharSequence

Returns a char sequence containing only those characters from the original char sequence that do not match the given predicate.

Since Kotlin 1.0
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inline fun <C : Appendable> CharSequence.filterNotTo(destination: C, predicate: (Char) -> Boolean): C

Appends all characters not matching the given predicate to the given destination.

Since Kotlin 1.0
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inline fun <C : Appendable> CharSequence.filterTo(destination: C, predicate: (Char) -> Boolean): C

Appends all characters matching the given predicate to the given destination.

Since Kotlin 1.0
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inline fun CharSequence.find(predicate: (Char) -> Boolean): Char?

Returns the first character matching the given predicate, or null if no such character was found.

Since Kotlin 1.0
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fun CharSequence.findAnyOf(strings: Collection<String>, startIndex: Int = 0, ignoreCase: Boolean = false): Pair<Int, String>?

Finds the first occurrence of any of the specified strings in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.1
fun CharSequence.findAnyOf(strings: Collection<String>, startIndex: Int = 0, ignoreCase: Boolean = false): Pair<Int, String>?

Finds the first occurrence of any of the specified strings in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.0
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inline fun CharSequence.findLast(predicate: (Char) -> Boolean): Char?

Returns the last character matching the given predicate, or null if no such character was found.

Since Kotlin 1.0
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fun CharSequence.findLastAnyOf(strings: Collection<String>, startIndex: Int = lastIndex, ignoreCase: Boolean = false): Pair<Int, String>?

Finds the last occurrence of any of the specified strings in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.1
fun CharSequence.findLastAnyOf(strings: Collection<String>, startIndex: Int = lastIndex, ignoreCase: Boolean = false): Pair<Int, String>?

Finds the last occurrence of any of the specified strings in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.0
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fun CharSequence.first(): Char

Returns first character.

Since Kotlin 1.0
inline fun CharSequence.first(predicate: (Char) -> Boolean): Char

Returns the first character matching the given predicate.

Since Kotlin 1.0
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fun CharSequence.firstOrNull(): Char?

Returns the first character, or null if the char sequence is empty.

Since Kotlin 1.0
inline fun CharSequence.firstOrNull(predicate: (Char) -> Boolean): Char?

Returns the first character matching the given predicate, or null if character was not found.

Since Kotlin 1.0
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inline fun <R> CharSequence.flatMap(transform: (Char) -> Iterable<R>): List<R>

Returns a single list of all elements yielded from results of transform function being invoked on each character of original char sequence.

Since Kotlin 1.0
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inline fun <R, C : MutableCollection<in R>> CharSequence.flatMapTo(destination: C, transform: (Char) -> Iterable<R>): C

Appends all elements yielded from results of transform function being invoked on each character of original char sequence, to the given destination.

Since Kotlin 1.0
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inline fun <R> CharSequence.fold(initial: R, operation: (acc: R, Char) -> R): R

Accumulates value starting with initial value and applying operation from left to right to current accumulator value and each character.

Since Kotlin 1.0
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inline fun <R> CharSequence.foldIndexed(initial: R, operation: (index: Int, acc: R, Char) -> R): R

Accumulates value starting with initial value and applying operation from left to right to current accumulator value and each character with its index in the original char sequence.

Since Kotlin 1.0
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inline fun <R> CharSequence.foldRight(initial: R, operation: (Char, acc: R) -> R): R

Accumulates value starting with initial value and applying operation from right to left to each character and current accumulator value.

Since Kotlin 1.0
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inline fun <R> CharSequence.foldRightIndexed(initial: R, operation: (index: Int, Char, acc: R) -> R): R

Accumulates value starting with initial value and applying operation from right to left to each character with its index in the original char sequence and current accumulator value.

Since Kotlin 1.0
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inline fun CharSequence.forEach(action: (Char) -> Unit)

Performs the given action on each character.

Since Kotlin 1.0
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inline fun CharSequence.forEachIndexed(action: (index: Int, Char) -> Unit)

Performs the given action on each character, providing sequential index with the character.

Since Kotlin 1.0
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expect open operator override fun get(index: Int): Char

Returns the character at the specified index in this character sequence.

Since Kotlin 1.1
expect open operator override fun get(index: Int): Char

Returns the character at the specified index in this character sequence.

Since Kotlin 1.0
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inline fun CharSequence.getOrElse(index: Int, defaultValue: (Int) -> Char): Char

Returns a character at the given index or the result of calling the defaultValue function if the index is out of bounds of this char sequence.

Since Kotlin 1.0
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fun CharSequence.getOrNull(index: Int): Char?

Returns a character at the given index or null if the index is out of bounds of this char sequence.

Since Kotlin 1.0
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inline fun <K> CharSequence.groupBy(keySelector: (Char) -> K): Map<K, List<Char>>

Groups characters of the original char sequence by the key returned by the given keySelector function applied to each character and returns a map where each group key is associated with a list of corresponding characters.

Since Kotlin 1.0
inline fun <K, V> CharSequence.groupBy(keySelector: (Char) -> K, valueTransform: (Char) -> V): Map<K, List<V>>

Groups values returned by the valueTransform function applied to each character of the original char sequence by the key returned by the given keySelector function applied to the character and returns a map where each group key is associated with a list of corresponding values.

Since Kotlin 1.0
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inline fun <K, M : MutableMap<in K, MutableList<Char>>> CharSequence.groupByTo(destination: M, keySelector: (Char) -> K): M

Groups characters of the original char sequence by the key returned by the given keySelector function applied to each character and puts to the destination map each group key associated with a list of corresponding characters.

Since Kotlin 1.0
inline fun <K, V, M : MutableMap<in K, MutableList<V>>> CharSequence.groupByTo(destination: M, keySelector: (Char) -> K, valueTransform: (Char) -> V): M

Groups values returned by the valueTransform function applied to each character of the original char sequence by the key returned by the given keySelector function applied to the character and puts to the destination map each group key associated with a list of corresponding values.

Since Kotlin 1.0
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inline fun <K> CharSequence.groupingBy(crossinline keySelector: (Char) -> K): Grouping<Char, K>

Creates a Grouping source from a char sequence to be used later with one of group-and-fold operations using the specified keySelector function to extract a key from each character.

Since Kotlin 1.1
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fun CharSequence.hasSurrogatePairAt(index: Int): Boolean

Returns true if this CharSequence has Unicode surrogate pair at the specified index.

Since Kotlin 1.1
fun CharSequence.hasSurrogatePairAt(index: Int): Boolean

Returns true if this CharSequence has Unicode surrogate pair at the specified index.

Since Kotlin 1.0
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fun CharSequence.indexOf(char: Char, startIndex: Int = 0, ignoreCase: Boolean = false): Int

Returns the index within this string of the first occurrence of the specified character, starting from the specified startIndex.

Since Kotlin 1.1
fun CharSequence.indexOf(string: String, startIndex: Int = 0, ignoreCase: Boolean = false): Int

Returns the index within this char sequence of the first occurrence of the specified string, starting from the specified startIndex.

Since Kotlin 1.1
fun CharSequence.indexOf(char: Char, startIndex: Int = 0, ignoreCase: Boolean = false): Int

Returns the index within this string of the first occurrence of the specified character, starting from the specified startIndex.

Since Kotlin 1.0
fun CharSequence.indexOf(string: String, startIndex: Int = 0, ignoreCase: Boolean = false): Int

Returns the index within this char sequence of the first occurrence of the specified string, starting from the specified startIndex.

Since Kotlin 1.0
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fun CharSequence.indexOfAny(chars: CharArray, startIndex: Int = 0, ignoreCase: Boolean = false): Int

Finds the index of the first occurrence of any of the specified chars in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.1
fun CharSequence.indexOfAny(strings: Collection<String>, startIndex: Int = 0, ignoreCase: Boolean = false): Int

Finds the index of the first occurrence of any of the specified strings in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.1
fun CharSequence.indexOfAny(chars: CharArray, startIndex: Int = 0, ignoreCase: Boolean = false): Int

Finds the index of the first occurrence of any of the specified chars in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.0
fun CharSequence.indexOfAny(strings: Collection<String>, startIndex: Int = 0, ignoreCase: Boolean = false): Int

Finds the index of the first occurrence of any of the specified strings in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.0
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inline fun CharSequence.indexOfFirst(predicate: (Char) -> Boolean): Int

Returns index of the first character matching the given predicate, or -1 if the char sequence does not contain such character.

Since Kotlin 1.0
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inline fun CharSequence.indexOfLast(predicate: (Char) -> Boolean): Int

Returns index of the last character matching the given predicate, or -1 if the char sequence does not contain such character.

Since Kotlin 1.0
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expect fun CharSequence.isBlank(): Boolean

Returns true if this string is empty or consists solely of whitespace characters.

Since Kotlin 1.0
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inline fun CharSequence.isEmpty(): Boolean

Returns true if this char sequence is empty (contains no characters).

Since Kotlin 1.1
inline fun CharSequence.isEmpty(): Boolean

Returns true if this char sequence is empty (contains no characters).

Since Kotlin 1.0
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inline fun CharSequence.isNotBlank(): Boolean

Returns true if this char sequence is not empty and contains some characters except of whitespace characters.

Since Kotlin 1.1
inline fun CharSequence.isNotBlank(): Boolean

Returns true if this char sequence is not empty and contains some characters except of whitespace characters.

Since Kotlin 1.0
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inline fun CharSequence.isNotEmpty(): Boolean

Returns true if this char sequence is not empty.

Since Kotlin 1.1
inline fun CharSequence.isNotEmpty(): Boolean

Returns true if this char sequence is not empty.

Since Kotlin 1.0
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inline fun CharSequence?.isNullOrBlank(): Boolean

Returns true if this nullable char sequence is either null or empty or consists solely of whitespace characters.

Since Kotlin 1.1
inline fun CharSequence?.isNullOrBlank(): Boolean

Returns true if this nullable char sequence is either null or empty or consists solely of whitespace characters.

Since Kotlin 1.0
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inline fun CharSequence?.isNullOrEmpty(): Boolean

Returns true if this nullable char sequence is either null or empty.

Since Kotlin 1.1
inline fun CharSequence?.isNullOrEmpty(): Boolean

Returns true if this nullable char sequence is either null or empty.

Since Kotlin 1.0
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operator fun CharSequence.iterator(): CharIterator

Iterator for characters of the given char sequence.

Since Kotlin 1.1
operator fun CharSequence.iterator(): CharIterator

Iterator for characters of the given char sequence.

Since Kotlin 1.0
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fun CharSequence.last(): Char

Returns the last character.

Since Kotlin 1.0
inline fun CharSequence.last(predicate: (Char) -> Boolean): Char

Returns the last character matching the given predicate.

Since Kotlin 1.0
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fun CharSequence.lastIndexOf(char: Char, startIndex: Int = lastIndex, ignoreCase: Boolean = false): Int

Returns the index within this char sequence of the last occurrence of the specified character, starting from the specified startIndex.

Since Kotlin 1.1
fun CharSequence.lastIndexOf(string: String, startIndex: Int = lastIndex, ignoreCase: Boolean = false): Int

Returns the index within this char sequence of the last occurrence of the specified string, starting from the specified startIndex.

Since Kotlin 1.1
fun CharSequence.lastIndexOf(char: Char, startIndex: Int = lastIndex, ignoreCase: Boolean = false): Int

Returns the index within this char sequence of the last occurrence of the specified character, starting from the specified startIndex.

Since Kotlin 1.0
fun CharSequence.lastIndexOf(string: String, startIndex: Int = lastIndex, ignoreCase: Boolean = false): Int

Returns the index within this char sequence of the last occurrence of the specified string, starting from the specified startIndex.

Since Kotlin 1.0
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fun CharSequence.lastIndexOfAny(chars: CharArray, startIndex: Int = lastIndex, ignoreCase: Boolean = false): Int

Finds the index of the last occurrence of any of the specified chars in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.1
fun CharSequence.lastIndexOfAny(strings: Collection<String>, startIndex: Int = lastIndex, ignoreCase: Boolean = false): Int

Finds the index of the last occurrence of any of the specified strings in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.1
fun CharSequence.lastIndexOfAny(chars: CharArray, startIndex: Int = lastIndex, ignoreCase: Boolean = false): Int

Finds the index of the last occurrence of any of the specified chars in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.0
fun CharSequence.lastIndexOfAny(strings: Collection<String>, startIndex: Int = lastIndex, ignoreCase: Boolean = false): Int

Finds the index of the last occurrence of any of the specified strings in this char sequence, starting from the specified startIndex and optionally ignoring the case.

Since Kotlin 1.0
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fun CharSequence.lastOrNull(): Char?

Returns the last character, or null if the char sequence is empty.

Since Kotlin 1.0
inline fun CharSequence.lastOrNull(predicate: (Char) -> Boolean): Char?

Returns the last character matching the given predicate, or null if no such character was found.

Since Kotlin 1.0
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fun CharSequence.lines(): List<String>

Splits this char sequence to a list of lines delimited by any of the following character sequences: CRLF, LF or CR.

Since Kotlin 1.1
fun CharSequence.lines(): List<String>

Splits this char sequence to a list of lines delimited by any of the following character sequences: CRLF, LF or CR.

Since Kotlin 1.0
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fun CharSequence.lineSequence(): Sequence<String>

Splits this char sequence to a sequence of lines delimited by any of the following character sequences: CRLF, LF or CR.

Since Kotlin 1.1
fun CharSequence.lineSequence(): Sequence<String>

Splits this char sequence to a sequence of lines delimited by any of the following character sequences: CRLF, LF or CR.

Since Kotlin 1.0
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inline fun <R> CharSequence.map(transform: (Char) -> R): List<R>

Returns a list containing the results of applying the given transform function to each character in the original char sequence.

Since Kotlin 1.0
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inline fun <R> CharSequence.mapIndexed(transform: (index: Int, Char) -> R): List<R>

Returns a list containing the results of applying the given transform function to each character and its index in the original char sequence.

Since Kotlin 1.0
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inline fun <R : Any> CharSequence.mapIndexedNotNull(transform: (index: Int, Char) -> R?): List<R>

Returns a list containing only the non-null results of applying the given transform function to each character and its index in the original char sequence.

Since Kotlin 1.0
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inline fun <R : Any, C : MutableCollection<in R>> CharSequence.mapIndexedNotNullTo(destination: C, transform: (index: Int, Char) -> R?): C

Applies the given transform function to each character and its index in the original char sequence and appends only the non-null results to the given destination.

Since Kotlin 1.0
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inline fun <R, C : MutableCollection<in R>> CharSequence.mapIndexedTo(destination: C, transform: (index: Int, Char) -> R): C

Applies the given transform function to each character and its index in the original char sequence and appends the results to the given destination.

Since Kotlin 1.0
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inline fun <R : Any> CharSequence.mapNotNull(transform: (Char) -> R?): List<R>

Returns a list containing only the non-null results of applying the given transform function to each character in the original char sequence.

Since Kotlin 1.0
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inline fun <R : Any, C : MutableCollection<in R>> CharSequence.mapNotNullTo(destination: C, transform: (Char) -> R?): C

Applies the given transform function to each character in the original char sequence and appends only the non-null results to the given destination.

Since Kotlin 1.0
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inline fun <R, C : MutableCollection<in R>> CharSequence.mapTo(destination: C, transform: (Char) -> R): C

Applies the given transform function to each character of the original char sequence and appends the results to the given destination.

Since Kotlin 1.0
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infix inline fun CharSequence.matches(regex: Regex): Boolean

Returns true if this char sequence matches the given regular expression.

Since Kotlin 1.1
infix inline fun CharSequence.matches(regex: Regex): Boolean

Returns true if this char sequence matches the given regular expression.

Since Kotlin 1.0
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fun CharSequence.max(): Char?
Since Kotlin 1.0
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inline fun <R : Comparable<R>> CharSequence.maxBy(selector: (Char) -> R): Char?
Since Kotlin 1.0
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fun CharSequence.maxWith(comparator: Comparator<in Char>): Char?
Since Kotlin 1.0
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fun CharSequence.min(): Char?
Since Kotlin 1.0
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inline fun <R : Comparable<R>> CharSequence.minBy(selector: (Char) -> R): Char?
Since Kotlin 1.0
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fun CharSequence.minWith(comparator: Comparator<in Char>): Char?
Since Kotlin 1.0
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fun CharSequence.none(): Boolean

Returns true if the char sequence has no characters.

Since Kotlin 1.0
inline fun CharSequence.none(predicate: (Char) -> Boolean): Boolean

Returns true if no characters match the given predicate.

Since Kotlin 1.0
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fun CharSequence.padEnd(length: Int, padChar: Char = ' '): CharSequence

Returns a char sequence with content of this char sequence padded at the end to the specified length with the specified character or space.

Since Kotlin 1.1
fun CharSequence.padEnd(length: Int, padChar: Char = ' '): CharSequence

Returns a char sequence with content of this char sequence padded at the end to the specified length with the specified character or space.

Since Kotlin 1.0
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fun CharSequence.padStart(length: Int, padChar: Char = ' '): CharSequence

Returns a char sequence with content of this char sequence padded at the beginning to the specified length with the specified character or space.

Since Kotlin 1.1
fun CharSequence.padStart(length: Int, padChar: Char = ' '): CharSequence

Returns a char sequence with content of this char sequence padded at the beginning to the specified length with the specified character or space.

Since Kotlin 1.0
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inline fun CharSequence.partition(predicate: (Char) -> Boolean): Pair<CharSequence, CharSequence>

Splits the original char sequence into pair of char sequences, where first char sequence contains characters for which predicate yielded true, while second char sequence contains characters for which predicate yielded false.

Since Kotlin 1.0
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inline fun CharSequence.reduce(operation: (acc: Char, Char) -> Char): Char

Accumulates value starting with the first character and applying operation from left to right to current accumulator value and each character.

Since Kotlin 1.0
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inline fun CharSequence.reduceIndexed(operation: (index: Int, acc: Char, Char) -> Char): Char

Accumulates value starting with the first character and applying operation from left to right to current accumulator value and each character with its index in the original char sequence.

Since Kotlin 1.0
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inline fun CharSequence.reduceRight(operation: (Char, acc: Char) -> Char): Char

Accumulates value starting with the last character and applying operation from right to left to each character and current accumulator value.

Since Kotlin 1.0
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inline fun CharSequence.reduceRightIndexed(operation: (index: Int, Char, acc: Char) -> Char): Char

Accumulates value starting with the last character and applying operation from right to left to each character with its index in the original char sequence and current accumulator value.

Since Kotlin 1.0
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expect fun CharSequence.regionMatches(thisOffset: Int, other: CharSequence, otherOffset: Int, length: Int, ignoreCase: Boolean = false): Boolean

Returns true if the specified range in this char sequence is equal to the specified range in another char sequence.

Since Kotlin 1.0
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fun CharSequence.removePrefix(prefix: CharSequence): CharSequence

If this char sequence starts with the given prefix, returns a new char sequence with the prefix removed. Otherwise, returns a new char sequence with the same characters.

Since Kotlin 1.1
fun CharSequence.removePrefix(prefix: CharSequence): CharSequence

If this char sequence starts with the given prefix, returns a new char sequence with the prefix removed. Otherwise, returns a new char sequence with the same characters.

Since Kotlin 1.0
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fun CharSequence.removeRange(range: IntRange): CharSequence

Returns a char sequence with content of this char sequence where its part at the given range is removed.

Since Kotlin 1.1
fun CharSequence.removeRange(startIndex: Int, endIndex: Int): CharSequence

Returns a char sequence with content of this char sequence where its part at the given range is removed.

Since Kotlin 1.1
fun CharSequence.removeRange(range: IntRange): CharSequence

Returns a char sequence with content of this char sequence where its part at the given range is removed.

Since Kotlin 1.0
fun CharSequence.removeRange(startIndex: Int, endIndex: Int): CharSequence

Returns a char sequence with content of this char sequence where its part at the given range is removed.

Since Kotlin 1.0
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fun CharSequence.removeSuffix(suffix: CharSequence): CharSequence

If this char sequence ends with the given suffix, returns a new char sequence with the suffix removed. Otherwise, returns a new char sequence with the same characters.

Since Kotlin 1.1
fun CharSequence.removeSuffix(suffix: CharSequence): CharSequence

If this char sequence ends with the given suffix, returns a new char sequence with the suffix removed. Otherwise, returns a new char sequence with the same characters.

Since Kotlin 1.0
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fun CharSequence.removeSurrounding(delimiter: CharSequence): CharSequence

When this char sequence starts with and ends with the given delimiter, returns a new char sequence having this delimiter removed both from the start and end. Otherwise returns a new char sequence with the same characters.

Since Kotlin 1.1
fun CharSequence.removeSurrounding(prefix: CharSequence, suffix: CharSequence): CharSequence

When this char sequence starts with the given prefix and ends with the given suffix, returns a new char sequence having both the given prefix and suffix removed. Otherwise returns a new char sequence with the same characters.

Since Kotlin 1.1
fun CharSequence.removeSurrounding(delimiter: CharSequence): CharSequence

When this char sequence starts with and ends with the given delimiter, returns a new char sequence having this delimiter removed both from the start and end. Otherwise returns a new char sequence with the same characters.

Since Kotlin 1.0
fun CharSequence.removeSurrounding(prefix: CharSequence, suffix: CharSequence): CharSequence

When this char sequence starts with the given prefix and ends with the given suffix, returns a new char sequence having both the given prefix and suffix removed. Otherwise returns a new char sequence with the same characters.

Since Kotlin 1.0
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expect fun CharSequence.repeat(n: Int): String

Returns a string containing this char sequence repeated n times.

Since Kotlin 1.0
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inline fun CharSequence.replace(regex: Regex, noinline transform: (MatchResult) -> CharSequence): String

Returns a new string obtained by replacing each substring of this char sequence that matches the given regular expression with the result of the given function transform that takes MatchResult and returns a string to be used as a replacement for that match.

Since Kotlin 1.1
inline fun CharSequence.replace(regex: Regex, replacement: String): String

Returns a new string obtained by replacing each substring of this char sequence that matches the given regular expression with the given replacement.

Since Kotlin 1.1
inline fun CharSequence.replace(regex: Regex, noinline transform: (MatchResult) -> CharSequence): String

Returns a new string obtained by replacing each substring of this char sequence that matches the given regular expression with the result of the given function transform that takes MatchResult and returns a string to be used as a replacement for that match.

Since Kotlin 1.0
inline fun CharSequence.replace(regex: Regex, replacement: String): String

Returns a new string obtained by replacing each substring of this char sequence that matches the given regular expression with the given replacement.

Since Kotlin 1.0
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inline fun CharSequence.replaceFirst(regex: Regex, replacement: String): String

Replaces the first occurrence of the given regular expression regex in this char sequence with specified replacement expression.

Since Kotlin 1.1
inline fun CharSequence.replaceFirst(regex: Regex, replacement: String): String

Replaces the first occurrence of the given regular expression regex in this char sequence with specified replacement expression.

Since Kotlin 1.0
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fun CharSequence.replaceRange(range: IntRange, replacement: CharSequence): CharSequence

Returns a char sequence with content of this char sequence where its part at the given range is replaced with the replacement char sequence.

Since Kotlin 1.1
fun CharSequence.replaceRange(startIndex: Int, endIndex: Int, replacement: CharSequence): CharSequence

Returns a char sequence with content of this char sequence where its part at the given range is replaced with the replacement char sequence.

Since Kotlin 1.1
fun CharSequence.replaceRange(range: IntRange, replacement: CharSequence): CharSequence

Returns a char sequence with content of this char sequence where its part at the given range is replaced with the replacement char sequence.

Since Kotlin 1.0
fun CharSequence.replaceRange(startIndex: Int, endIndex: Int, replacement: CharSequence): CharSequence

Returns a char sequence with content of this char sequence where its part at the given range is replaced with the replacement char sequence.

Since Kotlin 1.0
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expect fun reverse(): StringBuilder

Reverses the contents of this string builder and returns this instance.

Since Kotlin 1.1
expect fun reverse(): StringBuilder

Reverses the contents of this string builder and returns this instance.

Since Kotlin 1.0
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fun CharSequence.reversed(): CharSequence

Returns a char sequence with characters in reversed order.

Since Kotlin 1.0
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expect inline operator fun StringBuilder.set(index: Int, value: Char)

Sets the character at the specified index to the specified value.

Since Kotlin 1.0
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fun CharSequence.single(): Char

Returns the single character, or throws an exception if the char sequence is empty or has more than one character.

Since Kotlin 1.0
inline fun CharSequence.single(predicate: (Char) -> Boolean): Char

Returns the single character matching the given predicate, or throws exception if there is no or more than one matching character.

Since Kotlin 1.0
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fun CharSequence.singleOrNull(): Char?

Returns single character, or null if the char sequence is empty or has more than one character.

Since Kotlin 1.0
inline fun CharSequence.singleOrNull(predicate: (Char) -> Boolean): Char?

Returns the single character matching the given predicate, or null if character was not found or more than one character was found.

Since Kotlin 1.0
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fun CharSequence.slice(indices: Iterable<Int>): CharSequence

Returns a char sequence containing characters of the original char sequence at specified indices.

Since Kotlin 1.0
fun CharSequence.slice(indices: IntRange): CharSequence

Returns a char sequence containing characters of the original char sequence at the specified range of indices.

Since Kotlin 1.0
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inline fun CharSequence.split(regex: Regex, limit: Int = 0): List<String>

Splits this char sequence to a list of strings around matches of the given regular expression.

Since Kotlin 1.1
fun CharSequence.split(vararg delimiters: String, ignoreCase: Boolean = false, limit: Int = 0): List<String>
fun CharSequence.split(vararg delimiters: Char, ignoreCase: Boolean = false, limit: Int = 0): List<String>

Splits this char sequence to a list of strings around occurrences of the specified delimiters.

Since Kotlin 1.1
fun CharSequence.split(regex: Pattern, limit: Int = 0): List<String>

Splits this char sequence around matches of the given regular expression.

Since Kotlin 1.0
inline fun CharSequence.split(regex: Regex, limit: Int = 0): List<String>

Splits this char sequence to a list of strings around matches of the given regular expression.

Since Kotlin 1.0
fun CharSequence.split(vararg delimiters: String, ignoreCase: Boolean = false, limit: Int = 0): List<String>
fun CharSequence.split(vararg delimiters: Char, ignoreCase: Boolean = false, limit: Int = 0): List<String>

Splits this char sequence to a list of strings around occurrences of the specified delimiters.

Since Kotlin 1.0
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fun CharSequence.splitToSequence(vararg delimiters: String, ignoreCase: Boolean = false, limit: Int = 0): Sequence<String>
fun CharSequence.splitToSequence(vararg delimiters: Char, ignoreCase: Boolean = false, limit: Int = 0): Sequence<String>

Splits this char sequence to a sequence of strings around occurrences of the specified delimiters.

Since Kotlin 1.1
fun CharSequence.splitToSequence(vararg delimiters: String, ignoreCase: Boolean = false, limit: Int = 0): Sequence<String>
fun CharSequence.splitToSequence(vararg delimiters: Char, ignoreCase: Boolean = false, limit: Int = 0): Sequence<String>

Splits this char sequence to a sequence of strings around occurrences of the specified delimiters.

Since Kotlin 1.0
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fun CharSequence.startsWith(char: Char, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence starts with the specified character.

Since Kotlin 1.1
fun CharSequence.startsWith(prefix: CharSequence, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence starts with the specified prefix.

Since Kotlin 1.1
fun CharSequence.startsWith(prefix: CharSequence, startIndex: Int, ignoreCase: Boolean = false): Boolean

Returns true if a substring of this char sequence starting at the specified offset startIndex starts with the specified prefix.

Since Kotlin 1.1
fun CharSequence.startsWith(char: Char, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence starts with the specified character.

Since Kotlin 1.0
fun CharSequence.startsWith(prefix: CharSequence, ignoreCase: Boolean = false): Boolean

Returns true if this char sequence starts with the specified prefix.

Since Kotlin 1.0
fun CharSequence.startsWith(prefix: CharSequence, startIndex: Int, ignoreCase: Boolean = false): Boolean

Returns true if a substring of this char sequence starting at the specified offset startIndex starts with the specified prefix.

Since Kotlin 1.0
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expect open override fun subSequence(startIndex: Int, endIndex: Int): CharSequence

Returns a new character sequence that is a subsequence of this character sequence, starting at the specified startIndex and ending right before the specified endIndex.

Since Kotlin 1.1
expect open override fun subSequence(startIndex: Int, endIndex: Int): CharSequence

Returns a new character sequence that is a subsequence of this character sequence, starting at the specified startIndex and ending right before the specified endIndex.

Since Kotlin 1.0
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fun CharSequence.subSequence(range: IntRange): CharSequence

Returns a subsequence of this char sequence specified by the given range of indices.

Since Kotlin 1.1
fun CharSequence.subSequence(range: IntRange): CharSequence

Returns a subsequence of this char sequence specified by the given range of indices.

Since Kotlin 1.0
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fun CharSequence.substring(range: IntRange): String

Returns a substring of chars at indices from the specified range of this char sequence.

Since Kotlin 1.1
inline fun CharSequence.substring(startIndex: Int, endIndex: Int = length): String

Returns a substring of chars from a range of this char sequence starting at the startIndex and ending right before the endIndex.

Since Kotlin 1.1
fun CharSequence.substring(range: IntRange): String

Returns a substring of chars at indices from the specified range of this char sequence.

Since Kotlin 1.0
inline fun CharSequence.substring(startIndex: Int, endIndex: Int = length): String

Returns a substring of chars from a range of this char sequence starting at the startIndex and ending right before the endIndex.

Since Kotlin 1.0
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inline fun CharSequence.sumBy(selector: (Char) -> Int): Int

Returns the sum of all values produced by selector function applied to each character in the char sequence.

Since Kotlin 1.0
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inline fun CharSequence.sumByDouble(selector: (Char) -> Double): Double

Returns the sum of all values produced by selector function applied to each character in the char sequence.

Since Kotlin 1.0
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fun CharSequence.take(n: Int): CharSequence

Returns a subsequence of this char sequence containing the first n characters from this char sequence, or the entire char sequence if this char sequence is shorter.

Since Kotlin 1.0
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fun CharSequence.takeLast(n: Int): CharSequence

Returns a subsequence of this char sequence containing the last n characters from this char sequence, or the entire char sequence if this char sequence is shorter.

Since Kotlin 1.0
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inline fun CharSequence.takeLastWhile(predicate: (Char) -> Boolean): CharSequence

Returns a subsequence of this char sequence containing last characters that satisfy the given predicate.

Since Kotlin 1.0
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inline fun CharSequence.takeWhile(predicate: (Char) -> Boolean): CharSequence

Returns a subsequence of this char sequence containing the first characters that satisfy the given predicate.

Since Kotlin 1.0
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fun <C : MutableCollection<in Char>> CharSequence.toCollection(destination: C): C

Appends all characters to the given destination collection.

Since Kotlin 1.0
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fun CharSequence.toHashSet(): HashSet<Char>

Returns a new HashSet of all characters.

Since Kotlin 1.0
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fun CharSequence.toList(): List<Char>

Returns a List containing all characters.

Since Kotlin 1.0
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fun CharSequence.toMutableList(): MutableList<Char>

Returns a new MutableList filled with all characters of this char sequence.

Since Kotlin 1.0
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fun CharSequence.toSet(): Set<Char>

Returns a Set of all characters.

Since Kotlin 1.0
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fun CharSequence.toSortedSet(): SortedSet<Char>

Returns a new SortedSet of all characters.

Since Kotlin 1.0
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open override fun toString(): String
Since Kotlin 1.1
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fun CharSequence.trim(): CharSequence

Returns a sub sequence of this char sequence having leading and trailing whitespace removed.

Since Kotlin 1.1
fun CharSequence.trim(vararg chars: Char): CharSequence

Returns a sub sequence of this char sequence having leading and trailing characters from the chars array removed.

Since Kotlin 1.1
inline fun CharSequence.trim(predicate: (Char) -> Boolean): CharSequence

Returns a sub sequence of this char sequence having leading and trailing characters matching the predicate removed.

Since Kotlin 1.1
fun CharSequence.trim(): CharSequence

Returns a sub sequence of this char sequence having leading and trailing whitespace removed.

Since Kotlin 1.0
fun CharSequence.trim(vararg chars: Char): CharSequence

Returns a sub sequence of this char sequence having leading and trailing characters from the chars array removed.

Since Kotlin 1.0
inline fun CharSequence.trim(predicate: (Char) -> Boolean): CharSequence

Returns a sub sequence of this char sequence having leading and trailing characters matching the predicate removed.

Since Kotlin 1.0
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fun CharSequence.trimEnd(): CharSequence

Returns a sub sequence of this char sequence having trailing whitespace removed.

Since Kotlin 1.1
fun CharSequence.trimEnd(vararg chars: Char): CharSequence

Returns a sub sequence of this char sequence having trailing characters from the chars array removed.

Since Kotlin 1.1
inline fun CharSequence.trimEnd(predicate: (Char) -> Boolean): CharSequence

Returns a sub sequence of this char sequence having trailing characters matching the predicate removed.

Since Kotlin 1.1
fun CharSequence.trimEnd(): CharSequence

Returns a sub sequence of this char sequence having trailing whitespace removed.

Since Kotlin 1.0
fun CharSequence.trimEnd(vararg chars: Char): CharSequence

Returns a sub sequence of this char sequence having trailing characters from the chars array removed.

Since Kotlin 1.0
inline fun CharSequence.trimEnd(predicate: (Char) -> Boolean): CharSequence

Returns a sub sequence of this char sequence having trailing characters matching the predicate removed.

Since Kotlin 1.0
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fun CharSequence.trimStart(): CharSequence

Returns a sub sequence of this char sequence having leading whitespace removed.

Since Kotlin 1.1
fun CharSequence.trimStart(vararg chars: Char): CharSequence

Returns a sub sequence of this char sequence having leading characters from the chars array removed.

Since Kotlin 1.1
inline fun CharSequence.trimStart(predicate: (Char) -> Boolean): CharSequence

Returns a sub sequence of this char sequence having leading characters matching the predicate removed.

Since Kotlin 1.1
fun CharSequence.trimStart(): CharSequence

Returns a sub sequence of this char sequence having leading whitespace removed.

Since Kotlin 1.0
fun CharSequence.trimStart(vararg chars: Char): CharSequence

Returns a sub sequence of this char sequence having leading characters from the chars array removed.

Since Kotlin 1.0
inline fun CharSequence.trimStart(predicate: (Char) -> Boolean): CharSequence

Returns a sub sequence of this char sequence having leading characters matching the predicate removed.

Since Kotlin 1.0
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fun CharSequence.withIndex(): Iterable<IndexedValue<Char>>

Returns a lazy Iterable that wraps each character of the original char sequence into an IndexedValue containing the index of that character and the character itself.

Since Kotlin 1.0
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infix fun CharSequence.zip(other: CharSequence): List<Pair<Char, Char>>

Returns a list of pairs built from the characters of this and the other char sequences with the same index The returned list has length of the shortest char sequence.

Since Kotlin 1.0
inline fun <V> CharSequence.zip(other: CharSequence, transform: (a: Char, b: Char) -> V): List<V>

Returns a list of values built from the characters of this and the other char sequences with the same index using the provided transform function applied to each pair of characters. The returned list has length of the shortest char sequence.

Since Kotlin 1.0