Compukters Core/kotlin.text

Package-level declarations

Functions

concatToString

external fun CharArray.concatToString(startIndex: Int, endIndex: Int): String

contains

fun String.contains(char: Char): Boolean

Returns whether this string contains char.

fun String.contains(other: String): Boolean

endsWith

fun String.endsWith(suffix: String): Boolean

indexOf

fun String.indexOf(char: Char, startIndex: Int = 0): Int

Finds the first matching character at or after startIndex, clamped to zero.

fun String.indexOf(other: String, startIndex: Int = 0): Int

isBlank

fun String.isBlank(): Boolean

Returns whether this string is empty or contains only whitespace.

isEmpty

fun String.isEmpty(): Boolean

Returns whether this string contains no characters.

isNotBlank

fun String.isNotBlank(): Boolean

Returns whether this string contains a non-whitespace character.

isNotEmpty

fun String.isNotEmpty(): Boolean

Returns whether this string contains at least one character.

isWhitespace

fun Char.isWhitespace(): Boolean

Returns whether this UTF-16 character is Kotlin whitespace.

lastIndexOf

fun String.lastIndexOf(char: Char): Int

Finds the last matching character.

fun String.lastIndexOf(string: String): Int

Finds the last matching substring, starting at the last character.

fun String.lastIndexOf(char: Char, startIndex: Int): Int

Searches backwards from startIndex for char.

fun String.lastIndexOf(string: String, startIndex: Int): Int

Searches backwards from startIndex for string, comparing UTF-16 code units.

lines

fun String.lines(): List<String>

Splits on CRLF, LF or CR, retaining empty lines including the final line.

removePrefix

fun String.removePrefix(prefix: String): String

Removes prefix when present, otherwise returns this string.

removeSuffix

fun String.removeSuffix(suffix: String): String

Removes suffix when present, otherwise returns this string.

replace

fun String.replace(oldChar: Char, newChar: Char): String

Replaces every oldChar with newChar, comparing case-sensitively.

fun String.replace(oldValue: String, newValue: String): String

Replaces nonoverlapping oldValue matches. An empty oldValue inserts newValue at every UTF-16 boundary.

split

fun String.split(delimiter: Char, limit: Int = 0): List<String>

Splits on delimiter, retaining empty parts. Zero limit means no limit; positive limit keeps the remaining suffix.

fun String.split(delimiter: String, limit: Int = 0): List<String>

Splits on delimiter, retaining empty parts. An empty delimiter separates UTF-16 code units, including empty ends.

startsWith

fun String.startsWith(prefix: String): Boolean

substringAfter

fun String.substringAfter(delimiter: Char): String

fun String.substringAfter(delimiter: String): String

Returns the part after the first delimiter, or this string if absent.

fun String.substringAfter(delimiter: Char, missingDelimiterValue: String): String

fun String.substringAfter(delimiter: String, missingDelimiterValue: String): String

Returns the part after the first delimiter, or missingDelimiterValue if absent.

substringAfterLast

fun String.substringAfterLast(delimiter: Char): String

fun String.substringAfterLast(delimiter: String): String

Returns the part after the last delimiter, or this string if absent.

fun String.substringAfterLast(delimiter: Char, missingDelimiterValue: String): String

fun String.substringAfterLast(delimiter: String, missingDelimiterValue: String): String

Returns the part after the last delimiter, or missingDelimiterValue if absent.

substringBefore

fun String.substringBefore(delimiter: Char): String

fun String.substringBefore(delimiter: String): String

Returns the part before the first delimiter, or this string if absent.

fun String.substringBefore(delimiter: Char, missingDelimiterValue: String): String

fun String.substringBefore(delimiter: String, missingDelimiterValue: String): String

Returns the part before the first delimiter, or missingDelimiterValue if absent.

substringBeforeLast

fun String.substringBeforeLast(delimiter: Char): String

fun String.substringBeforeLast(delimiter: String): String

Returns the part before the last delimiter, or this string if absent.

fun String.substringBeforeLast(delimiter: Char, missingDelimiterValue: String): String

fun String.substringBeforeLast(delimiter: String, missingDelimiterValue: String): String

Returns the part before the last delimiter, or missingDelimiterValue if absent.

toIntOrNull

fun String.toIntOrNull(): Int?

Parses a signed decimal Int, or returns null for invalid input or overflow.

trim

fun String.trim(): String

Removes leading and trailing whitespace.

trimEnd

fun String.trimEnd(): String

Removes trailing whitespace.

trimStart

fun String.trimStart(): String

Removes leading whitespace.