CharSequence
Represents a readable sequence of Char values.
Properties
length
Returns the length of this character sequence.
abstract val length: Int
Functions
get
Returns the character at the specified index in this character sequence.
abstract operator fun get(index: Int): Char
subSequence
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.
abstract fun subSequence(
startIndex: Int,
endIndex: Int
): CharSequence
Extension Properties
indices
Returns the range of valid character indices for this char sequence.
val CharSequence.indices: IntRange
lastIndex
Returns the index of the last character in the char sequence or -1 if it is empty.
val CharSequence.lastIndex: Int
Extension Functions
all
Returns true
if all characters match the given predicate.
fun CharSequence.all(predicate: (Char) -> Boolean): Boolean
any
Returns true
if char sequence has at least one character.
fun CharSequence.any(): Boolean
Returns true
if at least one character matches the given predicate.
fun CharSequence.any(predicate: (Char) -> Boolean): Boolean
asIterable
Creates an Iterable instance that wraps the original char sequence returning its characters when being iterated.
fun CharSequence.asIterable(): Iterable<Char>
asSequence
Creates a Sequence instance that wraps the original char sequence returning its characters when being iterated.
fun CharSequence.asSequence(): Sequence<Char>
associate
Returns a Map containing key-value pairs provided by transform function applied to characters of the given char sequence.
fun <K, V> CharSequence.associate(
transform: (Char) -> Pair<K, V>
): Map<K, V>
associateBy
Returns a Map containing the characters from the given char sequence indexed by the key returned from keySelector function applied to each character.
fun <K> CharSequence.associateBy(
keySelector: (Char) -> K
): Map<K, Char>
Returns a Map containing the values provided by valueTransform and indexed by keySelector functions applied to characters of the given char sequence.
fun <K, V> CharSequence.associateBy(
keySelector: (Char) -> K,
valueTransform: (Char) -> V
): Map<K, V>
associateByTo
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.
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 and and value is provided by the valueTransform function applied to characters of the given char sequence.
fun <K, V, M : MutableMap<in K, in V>> CharSequence.associateByTo(
destination: M,
keySelector: (Char) -> K,
valueTransform: (Char) -> V
): M
associateTo
Populates and returns the destination mutable map with key-value pairs provided by transform function applied to each character of the given char sequence.
fun <K, V, M : MutableMap<in K, in V>> CharSequence.associateTo(
destination: M,
transform: (Char) -> Pair<K, V>
): M
associateWith
Returns a Map where keys are characters from the given char sequence and values are produced by the valueSelector function applied to each character.
fun <V> CharSequence.associateWith(
valueSelector: (Char) -> V
): Map<Char, V>
associateWithTo
Populates and returns the destination mutable map with key-value pairs for each character of the given char sequence, where key is the character itself and value is provided by the valueSelector function applied to that key.
fun <V, M : MutableMap<in Char, in V>> CharSequence.associateWithTo(
destination: M,
valueSelector: (Char) -> V
): M
chunked
Splits this char sequence into a list of strings each not exceeding the given size.
fun CharSequence.chunked(size: Int): List<String>
Splits this char sequence into several char sequences each not exceeding the given size and applies the given transform function to an each.
fun <R> CharSequence.chunked(
size: Int,
transform: (CharSequence) -> R
): List<R>
chunkedSequence
Splits this char sequence into a sequence of strings each not exceeding the given size.
fun CharSequence.chunkedSequence(size: Int): Sequence<String>
Splits this char sequence into several char sequences each not exceeding the given size and applies the given transform function to an each.
fun <R> CharSequence.chunkedSequence(
size: Int,
transform: (CharSequence) -> R
): Sequence<R>
commonPrefixWith
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.
fun CharSequence.commonPrefixWith(
other: CharSequence,
ignoreCase: Boolean = false
): String
commonSuffixWith
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.
fun CharSequence.commonSuffixWith(
other: CharSequence,
ignoreCase: Boolean = false
): String
contains
Returns true
if this char sequence contains the specified other sequence of characters as a substring.
operator fun CharSequence.contains(
other: CharSequence,
ignoreCase: Boolean = false
): Boolean
Returns true
if this char sequence contains the specified character char.
operator fun CharSequence.contains(
char: Char,
ignoreCase: Boolean = false
): Boolean
Returns true
if this char sequence contains at least one match of the specified regular expression regex.
operator fun CharSequence.contains(regex: Regex): Boolean
count
Returns the length of this char sequence.
fun CharSequence.count(): Int
Returns the number of characters matching the given predicate.
fun CharSequence.count(predicate: (Char) -> Boolean): Int
drop
Returns a subsequence of this char sequence with the first n characters removed.
fun CharSequence.drop(n: Int): CharSequence
dropLast
Returns a subsequence of this char sequence with the last n characters removed.
fun CharSequence.dropLast(n: Int): CharSequence
dropLastWhile
Returns a subsequence of this char sequence containing all characters except last characters that satisfy the given predicate.
fun CharSequence.dropLastWhile(
predicate: (Char) -> Boolean
): CharSequence
dropWhile
Returns a subsequence of this char sequence containing all characters except first characters that satisfy the given predicate.
fun CharSequence.dropWhile(
predicate: (Char) -> Boolean
): CharSequence
elementAtOrElse
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.
fun CharSequence.elementAtOrElse(
index: Int,
defaultValue: (Int) -> Char
): Char
elementAtOrNull
Returns a character at the given index or null
if the index is out of bounds of this char sequence.
fun CharSequence.elementAtOrNull(index: Int): Char?
endsWith
Returns true
if this char sequence ends with the specified character.
fun CharSequence.endsWith(
char: Char,
ignoreCase: Boolean = false
): Boolean
Returns true
if this char sequence ends with the specified suffix.
fun CharSequence.endsWith(
suffix: CharSequence,
ignoreCase: Boolean = false
): Boolean
filter
Returns a char sequence containing only those characters from the original char sequence that match the given predicate.
fun CharSequence.filter(
predicate: (Char) -> Boolean
): CharSequence
filterIndexed
Returns a char sequence containing only those characters from the original char sequence that match the given predicate.
fun CharSequence.filterIndexed(
predicate: (index: Int, Char) -> Boolean
): CharSequence
filterIndexedTo
Appends all characters matching the given predicate to the given destination.
fun <C : Appendable> CharSequence.filterIndexedTo(
destination: C,
predicate: (index: Int, Char) -> Boolean
): C
filterNot
Returns a char sequence containing only those characters from the original char sequence that do not match the given predicate.
fun CharSequence.filterNot(
predicate: (Char) -> Boolean
): CharSequence
filterNotTo
Appends all characters not matching the given predicate to the given destination.
fun <C : Appendable> CharSequence.filterNotTo(
destination: C,
predicate: (Char) -> Boolean
): C
filterTo
Appends all characters matching the given predicate to the given destination.
fun <C : Appendable> CharSequence.filterTo(
destination: C,
predicate: (Char) -> Boolean
): C
find
Returns the first character matching the given predicate, or null
if no such character was found.
fun CharSequence.find(predicate: (Char) -> Boolean): Char?
findAnyOf
Finds the first occurrence of any of the specified strings in this char sequence, starting from the specified startIndex and optionally ignoring the case.
fun CharSequence.findAnyOf(
strings: Collection<String>,
startIndex: Int = 0,
ignoreCase: Boolean = false
): Pair<Int, String>?
findLast
Returns the last character matching the given predicate, or null
if no such character was found.
fun CharSequence.findLast(
predicate: (Char) -> Boolean
): Char?
findLastAnyOf
Finds the last occurrence of any of the specified strings in this char sequence, starting from the specified startIndex and optionally ignoring the case.
fun CharSequence.findLastAnyOf(
strings: Collection<String>,
startIndex: Int = lastIndex,
ignoreCase: Boolean = false
): Pair<Int, String>?
first
Returns the first character.
fun CharSequence.first(): Char
Returns the first character matching the given predicate.
fun CharSequence.first(predicate: (Char) -> Boolean): Char
firstNotNullOf
Returns the first non-null value produced by transform function being applied to characters of this char sequence in iteration order, or throws NoSuchElementException if no non-null value was produced.
fun <R : Any> CharSequence.firstNotNullOf(
transform: (Char) -> R?
): R
firstNotNullOfOrNull
Returns the first non-null value produced by transform function being applied to characters of this char sequence in iteration order,
or null
if no non-null value was produced.
fun <R : Any> CharSequence.firstNotNullOfOrNull(
transform: (Char) -> R?
): R?
firstOrNull
Returns the first character, or null
if the char sequence is empty.
fun CharSequence.firstOrNull(): Char?
Returns the first character matching the given predicate, or null
if character was not found.
fun CharSequence.firstOrNull(
predicate: (Char) -> Boolean
): Char?
flatMap
Returns a single list of all elements yielded from results of transform function being invoked on each character of original char sequence.
fun <R> CharSequence.flatMap(
transform: (Char) -> Iterable<R>
): List<R>
flatMapIndexed
Returns a single list of all elements yielded from results of transform function being invoked on each character and its index in the original char sequence.
fun <R> CharSequence.flatMapIndexed(
transform: (index: Int, Char) -> Iterable<R>
): List<R>
flatMapIndexedTo
Appends all elements yielded from results of transform function being invoked on each character and its index in the original char sequence, to the given destination.
fun <R, C : MutableCollection<in R>> CharSequence.flatMapIndexedTo(
destination: C,
transform: (index: Int, Char) -> Iterable<R>
): C
flatMapTo
Appends all elements yielded from results of transform function being invoked on each character of original char sequence, to the given destination.
fun <R, C : MutableCollection<in R>> CharSequence.flatMapTo(
destination: C,
transform: (Char) -> Iterable<R>
): C
fold
Accumulates value starting with initial value and applying operation from left to right to current accumulator value and each character.
fun <R> CharSequence.fold(
initial: R,
operation: (acc: R, Char) -> R
): R
foldIndexed
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.
fun <R> CharSequence.foldIndexed(
initial: R,
operation: (index: Int, acc: R, Char) -> R
): R
foldRight
Accumulates value starting with initial value and applying operation from right to left to each character and current accumulator value.
fun <R> CharSequence.foldRight(
initial: R,
operation: (Char, acc: R) -> R
): R
foldRightIndexed
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.
fun <R> CharSequence.foldRightIndexed(
initial: R,
operation: (index: Int, Char, acc: R) -> R
): R
forEach
Performs the given action on each character.
fun CharSequence.forEach(action: (Char) -> Unit)
forEachIndexed
Performs the given action on each character, providing sequential index with the character.
fun CharSequence.forEachIndexed(
action: (index: Int, Char) -> Unit)
getOrElse
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.
fun CharSequence.getOrElse(
index: Int,
defaultValue: (Int) -> Char
): Char
getOrNull
Returns a character at the given index or null
if the index is out of bounds of this char sequence.
fun CharSequence.getOrNull(index: Int): Char?
groupBy
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.
fun <K> CharSequence.groupBy(
keySelector: (Char) -> K
): Map<K, List<Char>>
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.
fun <K, V> CharSequence.groupBy(
keySelector: (Char) -> K,
valueTransform: (Char) -> V
): Map<K, List<V>>
groupByTo
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.
fun <K, M : MutableMap<in K, MutableList<Char>>> CharSequence.groupByTo(
destination: M,
keySelector: (Char) -> K
): 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.
fun <K, V, M : MutableMap<in K, MutableList<V>>> CharSequence.groupByTo(
destination: M,
keySelector: (Char) -> K,
valueTransform: (Char) -> V
): M
groupingBy
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.
fun <K> CharSequence.groupingBy(
keySelector: (Char) -> K
): Grouping<Char, K>
hasSurrogatePairAt
Returns true
if this CharSequence has Unicode surrogate pair at the specified index.
fun CharSequence.hasSurrogatePairAt(index: Int): Boolean
indexOf
Returns the index within this string of the first occurrence of the specified character, starting from the specified startIndex.
fun CharSequence.indexOf(
char: Char,
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.
fun CharSequence.indexOf(
string: String,
startIndex: Int = 0,
ignoreCase: Boolean = false
): Int
indexOfAny
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.
fun CharSequence.indexOfAny(
chars: CharArray,
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.
fun CharSequence.indexOfAny(
strings: Collection<String>,
startIndex: Int = 0,
ignoreCase: Boolean = false
): Int
indexOfFirst
Returns index of the first character matching the given predicate, or -1 if the char sequence does not contain such character.
fun CharSequence.indexOfFirst(
predicate: (Char) -> Boolean
): Int
indexOfLast
Returns index of the last character matching the given predicate, or -1 if the char sequence does not contain such character.
fun CharSequence.indexOfLast(
predicate: (Char) -> Boolean
): Int
isBlank
Returns true
if this char sequence is empty or consists solely of whitespace characters according to Char.isWhitespace.
fun CharSequence.isBlank(): Boolean
isEmpty
Returns true
if this char sequence is empty (contains no characters).
fun CharSequence.isEmpty(): Boolean
isNotBlank
Returns true
if this char sequence is not empty and contains some characters except whitespace characters.
fun CharSequence.isNotBlank(): Boolean
isNotEmpty
Returns true
if this char sequence is not empty.
fun CharSequence.isNotEmpty(): Boolean
isNullOrBlank
Returns true
if this nullable char sequence is either null
or empty or consists solely of whitespace characters.
fun CharSequence?.isNullOrBlank(): Boolean
isNullOrEmpty
Returns true
if this nullable char sequence is either null
or empty.
fun CharSequence?.isNullOrEmpty(): Boolean
iterator
Iterator for characters of the given char sequence.
operator fun CharSequence.iterator(): CharIterator
last
Returns the last character.
fun CharSequence.last(): Char
Returns the last character matching the given predicate.
fun CharSequence.last(predicate: (Char) -> Boolean): Char
lastIndexOf
Returns the index within this char sequence of the last occurrence of the specified character, starting from the specified startIndex.
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 string, starting from the specified startIndex.
fun CharSequence.lastIndexOf(
string: String,
startIndex: Int = lastIndex,
ignoreCase: Boolean = false
): Int
lastIndexOfAny
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.
fun CharSequence.lastIndexOfAny(
chars: CharArray,
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.
fun CharSequence.lastIndexOfAny(
strings: Collection<String>,
startIndex: Int = lastIndex,
ignoreCase: Boolean = false
): Int
lastOrNull
Returns the last character, or null
if the char sequence is empty.
fun CharSequence.lastOrNull(): Char?
Returns the last character matching the given predicate, or null
if no such character was found.
fun CharSequence.lastOrNull(
predicate: (Char) -> Boolean
): Char?
lines
Splits this char sequence to a list of lines delimited by any of the following character sequences: CRLF, LF or CR.
fun CharSequence.lines(): List<String>
lineSequence
Splits this char sequence to a sequence of lines delimited by any of the following character sequences: CRLF, LF or CR.
fun CharSequence.lineSequence(): Sequence<String>
map
Returns a list containing the results of applying the given transform function to each character in the original char sequence.
fun <R> CharSequence.map(transform: (Char) -> R): List<R>
mapIndexed
Returns a list containing the results of applying the given transform function to each character and its index in the original char sequence.
fun <R> CharSequence.mapIndexed(
transform: (index: Int, Char) -> R
): List<R>
mapIndexedNotNull
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.
fun <R : Any> CharSequence.mapIndexedNotNull(
transform: (index: Int, Char) -> R?
): List<R>
mapIndexedNotNullTo
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.
fun <R : Any, C : MutableCollection<in R>> CharSequence.mapIndexedNotNullTo(
destination: C,
transform: (index: Int, Char) -> R?
): C
mapIndexedTo
Applies the given transform function to each character and its index in the original char sequence and appends the results to the given destination.
fun <R, C : MutableCollection<in R>> CharSequence.mapIndexedTo(
destination: C,
transform: (index: Int, Char) -> R
): C
mapNotNull
Returns a list containing only the non-null results of applying the given transform function to each character in the original char sequence.
fun <R : Any> CharSequence.mapNotNull(
transform: (Char) -> R?
): List<R>
mapNotNullTo
Applies the given transform function to each character in the original char sequence and appends only the non-null results to the given destination.
fun <R : Any, C : MutableCollection<in R>> CharSequence.mapNotNullTo(
destination: C,
transform: (Char) -> R?
): C
mapTo
Applies the given transform function to each character of the original char sequence and appends the results to the given destination.
fun <R, C : MutableCollection<in R>> CharSequence.mapTo(
destination: C,
transform: (Char) -> R
): C
matches
Returns true
if this char sequence matches the given regular expression.
infix fun CharSequence.matches(regex: Regex): Boolean
maxByOrNull
Returns the first character yielding the largest value of the given function or null
if there are no characters.
fun <R : Comparable<R>> CharSequence.maxByOrNull(
selector: (Char) -> R
): Char?
maxOf
Returns the largest value among all values produced by selector function applied to each character in the char sequence.
fun <R : Comparable<R>> any_iterable<R>.maxOf(
selector: (Char) -> R
): R
maxOfOrNull
Returns the largest value among all values produced by selector function
applied to each character in the char sequence or null
if there are no characters.
fun <R : Comparable<R>> any_iterable<R>.maxOfOrNull(
selector: (Char) -> R
): R?
maxOfWith
Returns the largest value according to the provided comparator among all values produced by selector function applied to each character in the char sequence.
fun <R> CharSequence.maxOfWith(
comparator: Comparator<in R>,
selector: (Char) -> R
): R
maxOfWithOrNull
Returns the largest value according to the provided comparator
among all values produced by selector function applied to each character in the char sequence or null
if there are no characters.
fun <R> CharSequence.maxOfWithOrNull(
comparator: Comparator<in R>,
selector: (Char) -> R
): R?
maxOrNull
Returns the largest character or null
if there are no characters.
fun CharSequence.maxOrNull(): Char?
maxWith
Returns the first character having the largest value according to the provided comparator.
fun CharSequence.maxWith(
comparator: Comparator<in Char>
): Char
fun CharSequence.maxWith(
comparator: Comparator<in Char>
): Char?
maxWithOrNull
Returns the first character having the largest value according to the provided comparator or null
if there are no characters.
fun CharSequence.maxWithOrNull(
comparator: Comparator<in Char>
): Char?
minByOrNull
Returns the first character yielding the smallest value of the given function or null
if there are no characters.
fun <R : Comparable<R>> CharSequence.minByOrNull(
selector: (Char) -> R
): Char?
minOf
Returns the smallest value among all values produced by selector function applied to each character in the char sequence.
fun <R : Comparable<R>> any_iterable<R>.minOf(
selector: (Char) -> R
): R
minOfOrNull
Returns the smallest value among all values produced by selector function
applied to each character in the char sequence or null
if there are no characters.
fun <R : Comparable<R>> any_iterable<R>.minOfOrNull(
selector: (Char) -> R
): R?
minOfWith
Returns the smallest value according to the provided comparator among all values produced by selector function applied to each character in the char sequence.
fun <R> CharSequence.minOfWith(
comparator: Comparator<in R>,
selector: (Char) -> R
): R
minOfWithOrNull
Returns the smallest value according to the provided comparator
among all values produced by selector function applied to each character in the char sequence or null
if there are no characters.
fun <R> CharSequence.minOfWithOrNull(
comparator: Comparator<in R>,
selector: (Char) -> R
): R?
minOrNull
Returns the smallest character or null
if there are no characters.
fun CharSequence.minOrNull(): Char?
minWith
Returns the first character having the smallest value according to the provided comparator.
fun CharSequence.minWith(
comparator: Comparator<in Char>
): Char
fun CharSequence.minWith(
comparator: Comparator<in Char>
): Char?
minWithOrNull
Returns the first character having the smallest value according to the provided comparator or null
if there are no characters.
fun CharSequence.minWithOrNull(
comparator: Comparator<in Char>
): Char?
none
Returns true
if the char sequence has no characters.
fun CharSequence.none(): Boolean
Returns true
if no characters match the given predicate.
fun CharSequence.none(predicate: (Char) -> Boolean): Boolean
onEach
Performs the given action on each character and returns the char sequence itself afterwards.
fun <S : CharSequence> S.onEach(action: (Char) -> Unit): S
onEachIndexed
Performs the given action on each character, providing sequential index with the character, and returns the char sequence itself afterwards.
fun <S : CharSequence> S.onEachIndexed(
action: (index: Int, Char) -> Unit
): S
padEnd
Returns a char sequence with content of this char sequence padded at the end to the specified length with the specified character or space.
fun CharSequence.padEnd(
length: Int,
padChar: Char = ' '
): CharSequence
padStart
Returns a char sequence with content of this char sequence padded at the beginning to the specified length with the specified character or space.
fun CharSequence.padStart(
length: Int,
padChar: Char = ' '
): CharSequence
partition
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
.
fun CharSequence.partition(
predicate: (Char) -> Boolean
): Pair<CharSequence, CharSequence>
random
Returns a random character from this char sequence.
fun CharSequence.random(): Char
Returns a random character from this char sequence using the specified source of randomness.
fun CharSequence.random(random: Random): Char
randomOrNull
Returns a random character from this char sequence, or null
if this char sequence is empty.
fun CharSequence.randomOrNull(): Char?
Returns a random character from this char sequence using the specified source of randomness, or null
if this char sequence is empty.
fun CharSequence.randomOrNull(random: Random): Char?
reduce
Accumulates value starting with the first character and applying operation from left to right to current accumulator value and each character.
fun CharSequence.reduce(
operation: (acc: Char, Char) -> Char
): Char
reduceIndexed
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.
fun CharSequence.reduceIndexed(
operation: (index: Int, acc: Char, Char) -> Char
): Char
reduceIndexedOrNull
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.
fun CharSequence.reduceIndexedOrNull(
operation: (index: Int, acc: Char, Char) -> Char
): Char?
reduceOrNull
Accumulates value starting with the first character and applying operation from left to right to current accumulator value and each character.
fun CharSequence.reduceOrNull(
operation: (acc: Char, Char) -> Char
): Char?
reduceRight
Accumulates value starting with the last character and applying operation from right to left to each character and current accumulator value.
fun CharSequence.reduceRight(
operation: (Char, acc: Char) -> Char
): Char
reduceRightIndexed
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.
fun CharSequence.reduceRightIndexed(
operation: (index: Int, Char, acc: Char) -> Char
): Char
reduceRightIndexedOrNull
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.
fun CharSequence.reduceRightIndexedOrNull(
operation: (index: Int, Char, acc: Char) -> Char
): Char?
reduceRightOrNull
Accumulates value starting with the last character and applying operation from right to left to each character and current accumulator value.
fun CharSequence.reduceRightOrNull(
operation: (Char, acc: Char) -> Char
): Char?
removePrefix
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.
fun CharSequence.removePrefix(
prefix: CharSequence
): CharSequence
removeRange
Returns a char sequence with content of this char sequence where its part at the given range is removed.
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.
fun CharSequence.removeRange(range: IntRange): CharSequence
removeSuffix
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.
fun CharSequence.removeSuffix(
suffix: CharSequence
): CharSequence
removeSurrounding
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.
fun CharSequence.removeSurrounding(
prefix: CharSequence,
suffix: 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.
fun CharSequence.removeSurrounding(
delimiter: CharSequence
): CharSequence
replace
Returns a new string obtained by replacing each substring of this char sequence that matches the given regular expression with the given replacement.
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 result of the given function transform that takes MatchResult and returns a string to be used as a replacement for that match.
fun CharSequence.replace(
regex: Regex,
transform: (MatchResult) -> CharSequence
): String
replaceFirst
Replaces the first occurrence of the given regular expression regex in this char sequence with specified replacement expression.
fun CharSequence.replaceFirst(
regex: Regex,
replacement: String
): String
replaceRange
Returns a char sequence with content of this char sequence where its part at the given range is replaced with the replacement char sequence.
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.
fun CharSequence.replaceRange(
range: IntRange,
replacement: CharSequence
): CharSequence
reversed
Returns a char sequence with characters in reversed order.
fun CharSequence.reversed(): CharSequence
runningFold
Returns a list containing successive accumulation values generated by applying operation from left to right to each character and current accumulator value that starts with initial value.
fun <R> CharSequence.runningFold(
initial: R,
operation: (acc: R, Char) -> R
): List<R>
runningFoldIndexed
Returns a list containing successive accumulation values generated by applying operation from left to right to each character, its index in the original char sequence and current accumulator value that starts with initial value.
fun <R> CharSequence.runningFoldIndexed(
initial: R,
operation: (index: Int, acc: R, Char) -> R
): List<R>
runningReduce
Returns a list containing successive accumulation values generated by applying operation from left to right to each character and current accumulator value that starts with the first character of this char sequence.
fun CharSequence.runningReduce(
operation: (acc: Char, Char) -> Char
): List<Char>
runningReduceIndexed
Returns a list containing successive accumulation values generated by applying operation from left to right to each character, its index in the original char sequence and current accumulator value that starts with the first character of this char sequence.
fun CharSequence.runningReduceIndexed(
operation: (index: Int, acc: Char, Char) -> Char
): List<Char>
scan
Returns a list containing successive accumulation values generated by applying operation from left to right to each character and current accumulator value that starts with initial value.
fun <R> CharSequence.scan(
initial: R,
operation: (acc: R, Char) -> R
): List<R>
scanIndexed
Returns a list containing successive accumulation values generated by applying operation from left to right to each character, its index in the original char sequence and current accumulator value that starts with initial value.
fun <R> CharSequence.scanIndexed(
initial: R,
operation: (index: Int, acc: R, Char) -> R
): List<R>
single
Returns the single character, or throws an exception if the char sequence is empty or has more than one character.
fun CharSequence.single(): Char
Returns the single character matching the given predicate, or throws exception if there is no or more than one matching character.
fun CharSequence.single(predicate: (Char) -> Boolean): Char
singleOrNull
Returns single character, or null
if the char sequence is empty or has more than one character.
fun CharSequence.singleOrNull(): Char?
Returns the single character matching the given predicate, or null
if character was not found or more than one character was found.
fun CharSequence.singleOrNull(
predicate: (Char) -> Boolean
): Char?
slice
Returns a char sequence containing characters of the original char sequence at the specified range of indices.
fun CharSequence.slice(indices: IntRange): CharSequence
Returns a char sequence containing characters of the original char sequence at specified indices.
fun CharSequence.slice(indices: Iterable<Int>): CharSequence
split
Splits this char sequence to a list of strings around occurrences of the specified delimiters.
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 matches of the given regular expression.
fun CharSequence.split(
regex: Regex,
limit: Int = 0
): List<String>
Splits this char sequence around matches of the given regular expression.
fun CharSequence.split(
regex: Pattern,
limit: Int = 0
): List<String>
splitToSequence
Splits this char sequence to a sequence of strings around occurrences of the specified delimiters.
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 matches of the given regular expression.
fun CharSequence.splitToSequence(
regex: Regex,
limit: Int = 0
): Sequence<String>
startsWith
Returns true
if this char sequence starts with the specified character.
fun CharSequence.startsWith(
char: Char,
ignoreCase: Boolean = false
): Boolean
Returns true
if this char sequence starts with the specified prefix.
fun CharSequence.startsWith(
prefix: CharSequence,
ignoreCase: Boolean = false
): Boolean
Returns true
if a substring of this char sequence starting at the specified offset startIndex starts with the specified prefix.
fun CharSequence.startsWith(
prefix: CharSequence,
startIndex: Int,
ignoreCase: Boolean = false
): Boolean
subSequence
Returns a subsequence of this char sequence specified by the given range of indices.
fun CharSequence.subSequence(range: IntRange): CharSequence
substring
Returns a substring of chars from a range of this char sequence starting at the startIndex and ending right before the endIndex.
fun CharSequence.substring(
startIndex: Int,
endIndex: Int = length
): String
Returns a substring of chars at indices from the specified range of this char sequence.
fun CharSequence.substring(range: IntRange): String
sumBy
Returns the sum of all values produced by selector function applied to each character in the char sequence.
fun CharSequence.sumBy(selector: (Char) -> Int): Int
sumByDouble
Returns the sum of all values produced by selector function applied to each character in the char sequence.
fun CharSequence.sumByDouble(
selector: (Char) -> Double
): Double
sumOf
Returns the sum of all values produced by selector function applied to each character in the char sequence.
fun CharSequence.sumOf(selector: (Char) -> Double): Double
fun CharSequence.sumOf(selector: (Char) -> Int): Int
fun CharSequence.sumOf(selector: (Char) -> Long): Long
fun CharSequence.sumOf(selector: (Char) -> UInt): UInt
fun CharSequence.sumOf(selector: (Char) -> ULong): ULong
fun CharSequence.sumOf(
selector: (Char) -> BigDecimal
): BigDecimal
fun CharSequence.sumOf(
selector: (Char) -> BigInteger
): BigInteger
take
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.
fun CharSequence.take(n: Int): CharSequence
takeLast
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.
fun CharSequence.takeLast(n: Int): CharSequence
takeLastWhile
Returns a subsequence of this char sequence containing last characters that satisfy the given predicate.
fun CharSequence.takeLastWhile(
predicate: (Char) -> Boolean
): CharSequence
takeWhile
Returns a subsequence of this char sequence containing the first characters that satisfy the given predicate.
fun CharSequence.takeWhile(
predicate: (Char) -> Boolean
): CharSequence
toCollection
Appends all characters to the given destination collection.
fun <C : MutableCollection<in Char>> CharSequence.toCollection(
destination: C
): C
toHashSet
Returns a new HashSet of all characters.
fun CharSequence.toHashSet(): HashSet<Char>
toList
Returns a List containing all characters.
fun CharSequence.toList(): List<Char>
toMutableList
Returns a new MutableList filled with all characters of this char sequence.
fun CharSequence.toMutableList(): MutableList<Char>
toSet
Returns a Set of all characters.
fun CharSequence.toSet(): Set<Char>
toSortedSet
Returns a new SortedSet of all characters.
fun CharSequence.toSortedSet(): SortedSet<Char>
trim
Returns a subsequence of this char sequence having leading and trailing characters matching the predicate removed.
fun CharSequence.trim(
predicate: (Char) -> Boolean
): CharSequence
Returns a subsequence of this char sequence having leading and trailing characters from the chars array removed.
fun CharSequence.trim(vararg chars: Char): CharSequence
Returns a subsequence of this char sequence having leading and trailing whitespace removed.
fun CharSequence.trim(): CharSequence
trimEnd
Returns a subsequence of this char sequence having trailing characters matching the predicate removed.
fun CharSequence.trimEnd(
predicate: (Char) -> Boolean
): CharSequence
Returns a subsequence of this char sequence having trailing characters from the chars array removed.
fun CharSequence.trimEnd(vararg chars: Char): CharSequence
Returns a subsequence of this char sequence having trailing whitespace removed.
fun CharSequence.trimEnd(): CharSequence
trimStart
Returns a subsequence of this char sequence having leading characters matching the predicate removed.
fun CharSequence.trimStart(
predicate: (Char) -> Boolean
): CharSequence
Returns a subsequence of this char sequence having leading characters from the chars array removed.
fun CharSequence.trimStart(vararg chars: Char): CharSequence
Returns a subsequence of this char sequence having leading whitespace removed.
fun CharSequence.trimStart(): CharSequence
windowed
Returns a list of snapshots of the window of the given size sliding along this char sequence with the given step, where each snapshot is a string.
fun CharSequence.windowed(
size: Int,
step: Int = 1,
partialWindows: Boolean = false
): List<String>
Returns a list of results of applying the given transform function to an each char sequence representing a view over the window of the given size sliding along this char sequence with the given step.
fun <R> CharSequence.windowed(
size: Int,
step: Int = 1,
partialWindows: Boolean = false,
transform: (CharSequence) -> R
): List<R>
windowedSequence
Returns a sequence of snapshots of the window of the given size sliding along this char sequence with the given step, where each snapshot is a string.
fun CharSequence.windowedSequence(
size: Int,
step: Int = 1,
partialWindows: Boolean = false
): Sequence<String>
Returns a sequence of results of applying the given transform function to an each char sequence representing a view over the window of the given size sliding along this char sequence with the given step.
fun <R> CharSequence.windowedSequence(
size: Int,
step: Int = 1,
partialWindows: Boolean = false,
transform: (CharSequence) -> R
): Sequence<R>
withIndex
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.
fun CharSequence.withIndex(): Iterable<IndexedValue<Char>>
zip
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.
infix fun CharSequence.zip(
other: CharSequence
): List<Pair<Char, Char>>
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.
fun <V> CharSequence.zip(
other: CharSequence,
transform: (a: Char, b: Char) -> V
): List<V>
zipWithNext
Returns a list of pairs of each two adjacent characters in this char sequence.
fun CharSequence.zipWithNext(): List<Pair<Char, Char>>
Returns a list containing the results of applying the given transform function to an each pair of two adjacent characters in this char sequence.
fun <R> CharSequence.zipWithNext(
transform: (a: Char, b: Char) -> R
): List<R>
Inheritors
String
The String
class represents character strings. All string literals in Kotlin programs, such as "abc"
, are
implemented as instances of this class.
class String : Comparable<String>, CharSequence
StringBuilder
A mutable sequence of characters.
class StringBuilder : Appendable, CharSequence
typealias StringBuilder = StringBuilder
class StringBuilder : CharSequence, Appendable