isEqualTo

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Description

Description:

Performs strict comparison between var1 and var2 and returns true if equal, otherwise false. Strict means that it would check that both arguments are of the same data type and then compare the values.

Some differences between isEqualTo and ==:

It performs case sensitive comparison on Strings
It doesn't throw error when comparing different types, i.e. ("eleven" isEqualTo 11)
It can compare Arrays, Scripts and Booleans (alive player isEqualTo true)
It can compare non-existent game objects (grpNull isEqualTo grpNull)
It can compare Namespaces (As of Arma 3 v1.47)
It is slightly faster than ==, especially when comparing Strings
ⓘ
A compiled code is not equal to the same compiled code made final:

_a = compile "123"; _b = compileFinal "123"; _a isEqualTo _b; // false

⚠

When comparing Arrays, if an array contains nil element, the comparison will return false. For example:

private _array1 = [1,nil,2]; private _array2 = [1,nil,2]; _array1 isEqualTo _array2 // false UNLESS the compared arrays are the same array: private _array1 = [1,nil,2]; private _array2 = _array1; _array1 isEqualTo _array2 // true

See: BIS_fnc_areEqual vs. BIS_fnc_areEqualNotNil

Groups:

Variables

Syntax

Syntax:: val1 isEqualTo val2
Parameters:: val1: Anything
: val2: Anything
Return Value:: Boolean

Examples

Example 1:: _arr1 = [1,[2,[3]]]; _arr2 = [1,[2,[3]]]; if (_arr1 isEqualTo _arr2) then {hint "Arrays match!"}
Example 2:: if (a isEqualTo b) then {hint "a is equal to b"}; if !(a isEqualTo b) then {hint "a is not equal to b"};

Additional Information

See also:: isNotEqualTo isEqualTypeAll isEqualTypeAny isEqualType isEqualTypeParams isEqualTypeArray a == b Operators

Notes

: Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note

: Posted on December 3, 2014 - 13:11 (UTC)
Tajin: Simply put, "isEqualTo" is a binary comparison. Therefor it is very fast but only accepts 100% identical matches. In some other languages this is known as "===" instead of "==".

: Posted on November 3, 2016 - 02:39 (UTC)
Dedmen: When comparing with nil result is Nothing. nil isEqualTo player; Returns Nothing instead of expected false diag_log [nil isEqualTo player]; Will print [bool]