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Intersects two arrays returning an array of unique common elements, avoiding nil values. Using the same array as both parameters will return unique elements of that array. Intersects only the first dimension of said arrays.
From Arma 3 v 2.14 the order of the intersected elements would follow 'array1' order


array1 arrayIntersect array2
array1: Array
array2: Array
Return Value:


Example 1:
_arr1 = [1,2,3,4,5,2,3,4]; _arr2 = [4,5,6,1,2,3,5,6]; hint str (_arr1 arrayIntersect _arr2); // [4,5,1,2,3]
Example 2:
_arr = [1,2,3,1,2,3,1,2,3,4,5]; hint str (_arr arrayIntersect _arr); // [1,2,3,4,5]
Example 3:
Remove nils:
hint str ([1,2,nil,3] arrayIntersect [1,2,nil,3]); // [1,2,3]
Example 4:
Also works with array elements which are equal:
hint str ([[1],[2],[3]] arrayIntersect [[2],[3],[4]]); // [[2],[3]]
Example 5:
This command is case-sensitive:
["cAse"] arrayIntersect ["cAse"]; // ["cAse"] ["cAse"] arrayIntersect ["casE"]; // []

Additional Information

See also:
append set pushBack pushBackUnique apply select resize reverse count find in forEach deleteAt deleteRange sort param params toArray toString splitString joinString BIS_fnc_arrayPushStack BIS_fnc_arrayPush


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Only post proven facts here! Add Note
Hypoxic125 - c
Posted on May 26, 2024 - 16:50 (UTC)
Selectively filter out elements from _arrayA based on _arrayB.
  • Designed to remove the first occurrence of each element found in _arrayB from _arrayA.
  • Useful in removing elements where duplicates may exist.
private _arrayA = [1, 2, 3, 2, 4, 5, 4]; private _arrayB = [2, 2, 4]; { private _index = _arrayA find _x; if (_index != -1) then { _arrayA deleteAt _index; }; } forEach _arrayB; _arrayA; // is now [1, 3, 5, 4]