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ArraysJVM.kt
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ArraysJVM.kt
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/*
* Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
* that can be found in the license/LICENSE.txt file.
*/
@file:kotlin.jvm.JvmMultifileClass
@file:kotlin.jvm.JvmName("ArraysKt")
package kotlin.collections
import java.nio.charset.Charset
/**
* Returns the array if it's not `null`, or an empty array otherwise.
* @sample samples.collections.Arrays.Usage.arrayOrEmpty
*/
public actual inline fun <reified T> Array<out T>?.orEmpty(): Array<out T> = this ?: emptyArray<T>()
/**
* Converts the contents of this byte array to a string using the specified [charset].
* @sample samples.text.Strings.stringToByteArray
*/
@kotlin.internal.InlineOnly
public inline fun ByteArray.toString(charset: Charset): String = String(this, charset)
/**
* Returns a *typed* array containing all of the elements of this collection.
*
* Allocates an array of runtime type `T` having its size equal to the size of this collection
* and populates the array with the elements of this collection.
* @sample samples.collections.Collections.Collections.collectionToTypedArray
*/
@Suppress("UNCHECKED_CAST")
public actual inline fun <reified T> Collection<T>.toTypedArray(): Array<T> {
@Suppress("PLATFORM_CLASS_MAPPED_TO_KOTLIN")
val thisCollection = this as java.util.Collection<T>
return thisCollection.toArray(arrayOfNulls<T>(0)) as Array<T>
}
/** Internal unsafe construction of array based on reference array type */
internal actual fun <T> arrayOfNulls(reference: Array<T>, size: Int): Array<T> {
@Suppress("UNCHECKED_CAST")
return java.lang.reflect.Array.newInstance(reference.javaClass.componentType, size) as Array<T>
}