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@file:kotlin.jvm.JvmMultifileClass
@file:kotlin.jvm.JvmName("StringsKt")
package kotlin
//
// NOTE THIS FILE IS AUTO-GENERATED by the GenerateStandardLib.kt
// See: https://github.com/JetBrains/kotlin/tree/master/libraries/stdlib
//
import java.util.*
import java.util.Collections // TODO: it's temporary while we have java.util.Collections in js
/**
* Returns an element at the given [index] or throws an [IndexOutOfBoundsException] if the [index] is out of bounds of this collection.
*/
public fun String.elementAt(index: Int): Char {
return get(index)
}
/**
* Returns an element at the given [index] or the result of calling the [defaultValue] function if the [index] is out of bounds of this collection.
*/
public inline fun String.elementAtOrElse(index: Int, defaultValue: (Int) -> Char): Char {
return if (index >= 0 && index <= lastIndex) get(index) else defaultValue(index)
}
/**
* Returns an element at the given [index] or `null` if the [index] is out of bounds of this collection.
*/
public fun String.elementAtOrNull(index: Int): Char? {
return if (index >= 0 && index <= lastIndex) get(index) else null
}
/**
* Returns the first character matching the given [predicate], or `null` if character was not found.
*/
public inline fun String.find(predicate: (Char) -> Boolean): Char? {
return firstOrNull(predicate)
}
/**
* Returns the last character matching the given [predicate], or `null` if no such character was found.
*/
public inline fun String.findLast(predicate: (Char) -> Boolean): Char? {
return lastOrNull(predicate)
}
/**
* Returns first character.
* @throws [NoSuchElementException] if the string is empty.
*/
public fun String.first(): Char {
if (isEmpty())
throw NoSuchElementException("Collection is empty.")
return this[0]
}
/**
* Returns the first character matching the given [predicate].
* @throws [NoSuchElementException] if no such character is found.
*/
public inline fun String.first(predicate: (Char) -> Boolean): Char {
for (element in this) if (predicate(element)) return element
throw NoSuchElementException("No element matching predicate was found.")
}
/**
* Returns the first character, or `null` if string is empty.
*/
public fun String.firstOrNull(): Char? {
return if (isEmpty()) null else this[0]
}
/**
* Returns the first character matching the given [predicate], or `null` if character was not found.
*/
public inline fun String.firstOrNull(predicate: (Char) -> Boolean): Char? {
for (element in this) if (predicate(element)) return element
return null
}
/**
* Returns an element at the given [index] or the result of calling the [defaultValue] function if the [index] is out of bounds of this collection.
*/
public inline fun String.getOrElse(index: Int, defaultValue: (Int) -> Char): Char {
return if (index >= 0 && index <= lastIndex) get(index) else defaultValue(index)
}
/**
* Returns an element at the given [index] or `null` if the [index] is out of bounds of this collection.
*/
public fun String.getOrNull(index: Int): Char? {
return if (index >= 0 && index <= lastIndex) get(index) else null
}
/**
* Returns index of the first element matching the given [predicate], or -1 if the collection does not contain such element.
*/
public inline fun String.indexOfFirst(predicate: (Char) -> Boolean): Int {
for (index in indices) {
if (predicate(this[index])) {
return index
}
}
return -1
}
/**
* Returns index of the last element matching the given [predicate], or -1 if the collection does not contain such element.
*/
public inline fun String.indexOfLast(predicate: (Char) -> Boolean): Int {
for (index in indices.reversed()) {
if (predicate(this[index])) {
return index
}
}
return -1
}
/**
* "Returns the last character.
* @throws [NoSuchElementException] if the string is empty.
*/
public fun String.last(): Char {
if (isEmpty())
throw NoSuchElementException("Collection is empty.")
return this[lastIndex]
}
/**
* "Returns the last character matching the given [predicate].
* @throws [NoSuchElementException] if no such character is found.
*/
public inline fun String.last(predicate: (Char) -> Boolean): Char {
var last: Char? = null
var found = false
for (element in this) {
if (predicate(element)) {
last = element
found = true
}
}
if (!found) throw NoSuchElementException("Collection doesn't contain any element matching the predicate.")
return last as Char
}
/**
* Returns the last character, or `null` if the string is empty.
*/
public fun String.lastOrNull(): Char? {
return if (isEmpty()) null else this[length() - 1]
}
/**
* Returns the last character matching the given [predicate], or `null` if no such character was found.
*/
public inline fun String.lastOrNull(predicate: (Char) -> Boolean): Char? {
var last: Char? = null
for (element in this) {
if (predicate(element)) {
last = element
}
}
return last
}
/**
* Returns the single character, or throws an exception if the string is empty or has more than one character.
*/
public fun String.single(): Char {
return when (length()) {
0 -> throw NoSuchElementException("Collection is empty.")
1 -> this[0]
else -> throw IllegalArgumentException("Collection has more than one element.")
}
}
/**
* Returns the single character matching the given [predicate], or throws exception if there is no or more than one matching character.
*/
public inline fun String.single(predicate: (Char) -> Boolean): Char {
var single: Char? = null
var found = false
for (element in this) {
if (predicate(element)) {
if (found) throw IllegalArgumentException("Collection contains more than one matching element.")
single = element
found = true
}
}
if (!found) throw NoSuchElementException("Collection doesn't contain any element matching predicate.")
return single as Char
}
/**
* Returns the single character, or `null` if the string is empty or has more than one character.
*/
public fun String.singleOrNull(): Char? {
return if (length() == 1) this[0] else null
}
/**
* Returns the single character matching the given [predicate], or `null` if character was not found or more than one character was found.
*/
public inline fun String.singleOrNull(predicate: (Char) -> Boolean): Char? {
var single: Char? = null
var found = false
for (element in this) {
if (predicate(element)) {
if (found) return null
single = element
found = true
}
}
if (!found) return null
return single
}
/**
* Returns a string with the first [n] characters removed.
*/
public fun String.drop(n: Int): String {
return substring(Math.min(n, length()))
}
/**
* Returns a string with the last [n] characters removed.
*/
public fun String.dropLast(n: Int): String {
require(n >= 0, { "Requested character count $n is less than zero." })
return take((length() - n).coerceAtLeast(0))
}
/**
* Returns a string containing all characters except last characters that satisfy the given [predicate].
*/
public inline fun String.dropLastWhile(predicate: (Char) -> Boolean): String {
return trimEnd(predicate)
}
/**
* Returns a string containing all characters except first characters that satisfy the given [predicate].
*/
public inline fun String.dropWhile(predicate: (Char) -> Boolean): String {
return trimStart(predicate)
}
/**
* Returns a string containing only those characters from the original string that match the given [predicate].
*/
public inline fun String.filter(predicate: (Char) -> Boolean): String {
return filterTo(StringBuilder(), predicate).toString()
}
/**
* Returns a string containing only those characters from the original string that do not match the given [predicate].
*/
public inline fun String.filterNot(predicate: (Char) -> Boolean): String {
return filterNotTo(StringBuilder(), predicate).toString()
}
/**
* Appends all characters not matching the given [predicate] to the given [destination].
*/
public inline fun String.filterNotTo(destination: C, predicate: (Char) -> Boolean): C {
for (element in this) if (!predicate(element)) destination.append(element)
return destination
}
/**
* Appends all characters matching the given [predicate] to the given [destination].
*/
public inline fun String.filterTo(destination: C, predicate: (Char) -> Boolean): C {
for (index in 0..length() - 1) {
val element = get(index)
if (predicate(element)) destination.append(element)
}
return destination
}
/**
* Returns a string containing characters at indices at the specified [indices].
*/
public fun String.slice(indices: IntRange): String {
if (indices.isEmpty()) return ""
return substring(indices)
}
/**
* Returns a string containing characters at specified [indices].
*/
public fun String.slice(indices: Iterable): String {
val size = indices.collectionSizeOrDefault(10)
if (size == 0) return ""
val result = StringBuilder(size)
for (i in indices) {
result.append(get(i))
}
return result.toString()
}
/**
* Returns a string containing the first [n] characters from this string, or the entire string if this string is shorter.
*/
public fun String.take(n: Int): String {
require(n >= 0, { "Requested character count $n is less than zero." })
return substring(0, Math.min(n, length()))
}
/**
* Returns a string containing the last [n] characters from this string, or the entire string if this string is shorter.
*/
public fun String.takeLast(n: Int): String {
require(n >= 0, { "Requested character count $n is less than zero." })
val length = length()
return substring(length - Math.min(n, length), length)
}
/**
* Returns a string containing last characters that satisfy the given [predicate].
*/
public inline fun String.takeLastWhile(predicate: (Char) -> Boolean): String {
for (index in lastIndex downTo 0) {
if (!predicate(this[index])) {
return substring(index + 1)
}
}
return this
}
/**
* Returns a string containing the first characters that satisfy the given [predicate].
*/
public inline fun String.takeWhile(predicate: (Char) -> Boolean): String {
for (index in 0..length() - 1)
if (!predicate(get(index))) {
return substring(0, index)
}
return this
}
/**
* Returns a string with characters in reversed order.
*/
public fun String.reversed(): String {
return StringBuilder().append(this).reverse().toString()
}
/**
* Returns an [ArrayList] of all elements.
*/
public fun String.toArrayList(): ArrayList {
return toCollection(ArrayList(length()))
}
/**
* Appends all elements to the given [collection].
*/
public fun > String.toCollection(collection: C): C {
for (item in this) {
collection.add(item)
}
return collection
}
/**
* Returns a [HashSet] of all elements.
*/
public fun String.toHashSet(): HashSet {
return toCollection(HashSet(mapCapacity(length())))
}
/**
* Returns a [LinkedList] containing all elements.
*/
public fun String.toLinkedList(): LinkedList {
return toCollection(LinkedList())
}
/**
* Returns a [List] containing all elements.
*/
public fun String.toList(): List {
return this.toArrayList()
}
@Deprecated("Use toMapBy instead.", ReplaceWith("toMapBy(selector)"))
public inline fun String.toMap(selector: (Char) -> K): Map {
return toMapBy(selector)
}
/**
* Returns Map containing the values provided by [transform] and indexed by [selector] from the given collection.
* If any two elements would have the same key returned by [selector] the last one gets added to the map.
*/
public inline fun String.toMap(selector: (Char) -> K, transform: (Char) -> V): Map {
val capacity = (length()/.75f) + 1
val result = LinkedHashMap(Math.max(capacity.toInt(), 16))
for (element in this) {
result.put(selector(element), transform(element))
}
return result
}
/**
* Returns Map containing the values from the given collection indexed by [selector].
* If any two elements would have the same key returned by [selector] the last one gets added to the map.
*/
public inline fun String.toMapBy(selector: (Char) -> K): Map {
val capacity = (length()/.75f) + 1
val result = LinkedHashMap(Math.max(capacity.toInt(), 16))
for (element in this) {
result.put(selector(element), element)
}
return result
}
/**
* Returns a [Set] of all elements.
*/
public fun String.toSet(): Set {
return toCollection(LinkedHashSet(mapCapacity(length())))
}
/**
* Returns a [SortedSet] of all elements.
*/
public fun String.toSortedSet(): SortedSet {
return toCollection(TreeSet())
}
/**
* Returns a single list of all elements yielded from results of [transform] function being invoked on each element of original collection.
*/
public inline fun String.flatMap(transform: (Char) -> Iterable): List {
return flatMapTo(ArrayList(), transform)
}
/**
* Appends all elements yielded from results of [transform] function being invoked on each element of original collection, to the given [destination].
*/
public inline fun > String.flatMapTo(destination: C, transform: (Char) -> Iterable): C {
for (element in this) {
val list = transform(element)
destination.addAll(list)
}
return destination
}
/**
* Returns a map of the elements in original collection grouped by the result of given [toKey] function.
*/
public inline fun String.groupBy(toKey: (Char) -> K): Map> {
return groupByTo(LinkedHashMap>(), toKey)
}
/**
* Appends elements from original collection grouped by the result of given [toKey] function to the given [map].
*/
public inline fun String.groupByTo(map: MutableMap>, toKey: (Char) -> K): Map> {
for (element in this) {
val key = toKey(element)
val list = map.getOrPut(key) { ArrayList() }
list.add(element)
}
return map
}
/**
* Returns a list containing the results of applying the given [transform] function to each element of the original collection.
*/
public inline fun String.map(transform: (Char) -> R): List {
return mapTo(ArrayList(length()), transform)
}
/**
* Returns a list containing the results of applying the given [transform] function to each element and its index of the original collection.
*/
public inline fun String.mapIndexed(transform: (Int, Char) -> R): List {
return mapIndexedTo(ArrayList(length()), transform)
}
/**
* Appends transformed elements and their indices of the original collection using the given [transform] function
* to the given [destination].
*/
public inline fun > String.mapIndexedTo(destination: C, transform: (Int, Char) -> R): C {
var index = 0
for (item in this)
destination.add(transform(index++, item))
return destination
}
/**
* Appends transformed elements of the original collection using the given [transform] function
* to the given [destination].
*/
public inline fun > String.mapTo(destination: C, transform: (Char) -> R): C {
for (item in this)
destination.add(transform(item))
return destination
}
/**
* Returns a lazy [Iterable] of [IndexedValue] for each element of the original collection.
*/
public fun String.withIndex(): Iterable> {
return IndexingIterable { iterator() }
}
/**
* Returns `true` if all elements match the given [predicate].
*/
public inline fun String.all(predicate: (Char) -> Boolean): Boolean {
for (element in this) if (!predicate(element)) return false
return true
}
/**
* Returns `true` if collection has at least one element.
*/
public fun String.any(): Boolean {
for (element in this) return true
return false
}
/**
* Returns `true` if at least one element matches the given [predicate].
*/
public inline fun String.any(predicate: (Char) -> Boolean): Boolean {
for (element in this) if (predicate(element)) return true
return false
}
/**
* Returns the length of this string.
*/
public fun String.count(): Int {
return length()
}
/**
* Returns the number of elements matching the given [predicate].
*/
public inline fun String.count(predicate: (Char) -> Boolean): Int {
var count = 0
for (element in this) if (predicate(element)) count++
return count
}
/**
* Accumulates value starting with [initial] value and applying [operation] from left to right to current accumulator value and each element.
*/
public inline fun String.fold(initial: R, operation: (R, Char) -> R): R {
var accumulator = initial
for (element in this) accumulator = operation(accumulator, element)
return accumulator
}
/**
* Accumulates value starting with [initial] value and applying [operation] from right to left to each element and current accumulator value.
*/
public inline fun String.foldRight(initial: R, operation: (Char, R) -> R): R {
var index = lastIndex
var accumulator = initial
while (index >= 0) {
accumulator = operation(get(index--), accumulator)
}
return accumulator
}
/**
* Performs the given [operation] on each element.
*/
public inline fun String.forEach(operation: (Char) -> Unit): Unit {
for (element in this) operation(element)
}
/**
* Performs the given [operation] on each element, providing sequential index with the element.
*/
public inline fun String.forEachIndexed(operation: (Int, Char) -> Unit): Unit {
var index = 0
for (item in this) operation(index++, item)
}
/**
* Returns the largest element or `null` if there are no elements.
*/
public fun String.max(): Char? {
val iterator = iterator()
if (!iterator.hasNext()) return null
var max = iterator.next()
while (iterator.hasNext()) {
val e = iterator.next()
if (max < e) max = e
}
return max
}
/**
* Returns the first element yielding the largest value of the given function or `null` if there are no elements.
*/
public inline fun > String.maxBy(f: (Char) -> R): Char? {
val iterator = iterator()
if (!iterator.hasNext()) return null
var maxElem = iterator.next()
var maxValue = f(maxElem)
while (iterator.hasNext()) {
val e = iterator.next()
val v = f(e)
if (maxValue < v) {
maxElem = e
maxValue = v
}
}
return maxElem
}
/**
* Returns the smallest element or `null` if there are no elements.
*/
public fun String.min(): Char? {
val iterator = iterator()
if (!iterator.hasNext()) return null
var min = iterator.next()
while (iterator.hasNext()) {
val e = iterator.next()
if (min > e) min = e
}
return min
}
/**
* Returns the first element yielding the smallest value of the given function or `null` if there are no elements.
*/
public inline fun > String.minBy(f: (Char) -> R): Char? {
val iterator = iterator()
if (!iterator.hasNext()) return null
var minElem = iterator.next()
var minValue = f(minElem)
while (iterator.hasNext()) {
val e = iterator.next()
val v = f(e)
if (minValue > v) {
minElem = e
minValue = v
}
}
return minElem
}
/**
* Returns `true` if collection has no elements.
*/
public fun String.none(): Boolean {
for (element in this) return false
return true
}
/**
* Returns `true` if no elements match the given [predicate].
*/
public inline fun String.none(predicate: (Char) -> Boolean): Boolean {
for (element in this) if (predicate(element)) return false
return true
}
/**
* Accumulates value starting with the first element and applying [operation] from left to right to current accumulator value and each element.
*/
public inline fun String.reduce(operation: (Char, Char) -> Char): Char {
val iterator = this.iterator()
if (!iterator.hasNext()) throw UnsupportedOperationException("Empty iterable can't be reduced.")
var accumulator = iterator.next()
while (iterator.hasNext()) {
accumulator = operation(accumulator, iterator.next())
}
return accumulator
}
/**
* Accumulates value starting with last element and applying [operation] from right to left to each element and current accumulator value.
*/
public inline fun String.reduceRight(operation: (Char, Char) -> Char): Char {
var index = lastIndex
if (index < 0) throw UnsupportedOperationException("Empty iterable can't be reduced.")
var accumulator = get(index--)
while (index >= 0) {
accumulator = operation(get(index--), accumulator)
}
return accumulator
}
/**
* Returns the sum of all values produced by [transform] function from characters in the string.
*/
public inline fun String.sumBy(transform: (Char) -> Int): Int {
var sum: Int = 0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Returns the sum of all values produced by [transform] function from characters in the string.
*/
public inline fun String.sumByDouble(transform: (Char) -> Double): Double {
var sum: Double = 0.0
for (element in this) {
sum += transform(element)
}
return sum
}
/**
* Splits the original string into pair of strings,
* where *first* string contains characters for which [predicate] yielded `true`,
* while *second* string contains characters for which [predicate] yielded `false`.
*/
public inline fun String.partition(predicate: (Char) -> Boolean): Pair {
val first = StringBuilder()
val second = StringBuilder()
for (element in this) {
if (predicate(element)) {
first.append(element)
} else {
second.append(element)
}
}
return Pair(first.toString(), second.toString())
}
/**
* Returns a list of pairs built from characters of both strings with same indexes. List has length of shortest collection.
*/
public fun String.zip(other: String): List> {
return zip(other) { c1, c2 -> c1 to c2 }
}
/**
* Returns a list of values built from characters of both strings with same indexes using provided [transform]. List has length of shortest string.
*/
public inline fun String.zip(other: String, transform: (Char, Char) -> V): List {
val length = Math.min(this.length(), other.length())
val list = ArrayList(length)
for (i in 0..length-1) {
list.add(transform(this[i], other[i]))
}
return list
}
/**
* Returns a sequence from the given collection.
*/
public fun String.asSequence(): Sequence {
if (isEmpty()) return emptySequence()
return object : Sequence {
override fun iterator(): Iterator {
return [email protected]()
}
}
}
