James Strachan
27 lines
910 B
Kotlin
27 lines
910 B
Kotlin
package kotlin
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import java.util.*
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//
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// This file contains methods which are optimised for working on Collection / Array collections where the size
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// could be used to implement a more optimal solution
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//
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// See [[GenerateStandardLib.kt]] for more details
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//
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/**
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* Returns a new List containing the results of applying the given function to each element in this collection
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*
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* @includeFunctionBody ../../test/CollectionTest.kt map
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*/
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public inline fun <T, R> java.util.Collection<T>.map(transform : (T) -> R) : java.util.List<R> {
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return mapTo(java.util.ArrayList<R>(this.size), transform)
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}
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/** Transforms each element of this collection with the given function then adds the results to the given collection */
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public inline fun <T, R, C: Collection<in R>> java.util.Collection<T>.mapTo(result: C, transform : (T) -> R) : C {
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for (item in this)
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result.add(transform(item))
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return result
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}
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