apply

1.56

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Description

Description:

Applies the given code to each element of the given data structure and collects the results in an array.

Groups:

ArraysHashMap

Syntax

Syntax:

array apply code

Parameters:

array: Array - array of Anything

code: Code - code to be executed on each element of the array. The current element value is stored in the magic variable _x.

Return Value:

Array - resulting array

2.04

Alternative Syntax

Syntax:

hashmap apply code

Parameters:

hashmap: HashMap

code: Code - Code to be executed on each key-value pair of the hashmap. The current key is stored in the magic variable _x, the corresponding value is stored in _y.

Return Value:

Array - resulting array

Examples

Example 1:

private _arr = [1,2,3,4,5,6,7,8,9,0] apply { [1,0] select (_x % 2 == 0) }; // [1,0,1,0,1,0,1,0,1,0]

Example 2:

private _arr = [1,2,3,4,5,6,7,8,9,0] apply { _x ^ _x }; // [1,4,27,256,3125,46656,823543,16777216,387420480,1]

Example 3:

private _arr1 = []; _arr1 resize 20; _arr2 = _arr1 apply { 0 }; // [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]

Example 4:

[0,1,2,3,4] apply { str _x }; // ["0","1","2","3","4"]

Example 5:

private _hashmap = createHashMapFromArray [["Key 1", "Value 1"], ["Key 2", "Value 2"]]; private _array = _hashmap apply { _y + " Test" }; // ["Value 2 Test","Value 1 Test"]

Additional Information

See also:

set resize pushBack pushBackUnique select reverse count find in forEach deleteAt deleteRange append sort arrayIntersect

Notes

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Only post proven facts here! Add Note

Fusselwurm - c

Posted on Feb 18, 2016 - 11:03 (UTC)

(to anyone else wondering, I took a minute to get it) this is Array.map() in JavaScript

Lou Montana - c

Posted on Feb 11, 2018 - 23:02 (UTC)

if performance really is an issue, apply seems to be (very) slightly faster than forEach (by more or less one percent, 0.7-1.5% in my tests to be precise).