equals

Common
JVM
JS
1.0
fun String?.equals(
    other: String?,
    ignoreCase: Boolean = false
): Boolean
Native
1.3
fun String?.equals(
    other: String?,
    ignoreCase: Boolean
): Boolean

Returns true if this string is equal to other, optionally ignoring character case.

Parameters

ignoreCase - true to ignore character case when comparing strings. By default false.

Common
JVM
JS
Native
1.0
fun Char.equals(
    other: Char,
    ignoreCase: Boolean = false
): Boolean

Returns true if this character is equal to the other character, optionally ignoring character case.

import java.util.*
import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
println("'a'.equals('a', false) is ${'a'.equals('a', false)}") // true
println("'a'.equals('A', false) is ${'a'.equals('A', false)}") // false
println("'a'.equals('A', true) is ${'a'.equals('A', true)}") // true
//sampleEnd
}

Parameters

ignoreCase -

true to ignore character case when comparing characters. By default false.

Two characters are considered the same ignoring case if at least one of the following is true:

  • The two characters are the same (as compared by the == operator)
  • Applying the method uppercaseChar to each character produces the same result
  • Applying the method lowercaseChar to each character produces the same result