forEachReversed

2.14

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Description

Description:

Executes the given command(s) on every item of an Array in reversed order, compared to forEach.

Groups:

Program FlowArrays

Syntax

Syntax:

code forEachReversed array

Parameters:

code: Code to execute on each array item - available variables:

• _x: iterated item
• _forEachIndex: item's index

array: Array - the array to iterate over

Return Value:

Anything - will return the value of last executed statement

Examples

Example 1:

This command lets you easily iterate through an array from last to first element without modifying the array itself with reverse or using for loop with negative step.

// Will show numbers from 5 to 1 in the chat { systemChat str _x } forEachReversed [1, 2, 3, 4, 5];

Example 2:

Can be useful to walk through array while also deleting items from it, which you couldn't do with forEach as easily:

private _array = [1, 1, 2, 2, 1, 1, 2, 2]; { if (_x == 2) then { _array deleteAt _forEachIndex }; } forEachReversed _array; // _array will be [1,1,1,1] here

Will not work with forEach as you might expect it:

private _array = [1, 1, 2, 2, 1, 1, 2, 2]; { if (_x == 2) then { _array deleteAt _forEachIndex }; } forEach _array; // _array will be [1, 1, 2, 1, 1, 2] here

Example 3:

Deleting items from array with more complex condition than just comparison.

{ if (!alive _x) then { _vehicles deleteAt _forEachIndex }; } forEachReversed _vehicles;

Additional Information

See also:

Control Structures forEach for apply while select findIf count deleteAt reverse

Notes

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