isEqualTo: Difference between revisions
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Lou Montana (talk | contribs) m (Text replacement - "<code>([^ ]*)\[\[([a-zA-Z][a-zA-Z0-9_]+)\]\]([^ ]*)<\/code>" to "<code>$1$2$3</code>") |
Lou Montana (talk | contribs) m (Text replacement - "<code>([^ ]*)\[\[([a-zA-Z][a-zA-Z0-9_]+)\]\]([^ ]*)<\/code>" to "<code>$1$2$3</code>") |
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* It can compare [[Namespace]]s (''As of Arma 3 v1.47'') | * It can compare [[Namespace]]s (''As of Arma 3 v1.47'') | ||
* It is slightly faster than [[==]], especially when comparing [[String]]s {{Feature | Informative | A compiled code is not equal to the same compiled code made final: | * It is slightly faster than [[==]], especially when comparing [[String]]s {{Feature | Informative | A compiled code is not equal to the same compiled code made final: | ||
<code>_a {{=}} compile "123"; _b {{=}} | <code>_a {{=}} compile "123"; _b {{=}} compileFinal "123"; _a [[isEqualTo]] _b; // false</code> }} | ||
{{Feature | Warning | When comparing [[Array]]s, if an array contains [[nil]] element, the comparison will return [[false]]. For example:<br> | {{Feature | Warning | When comparing [[Array]]s, if an array contains [[nil]] element, the comparison will return [[false]]. For example:<br> | ||
<code>[[private]] _array1 {{=}} [1,[[nil]],2]; | <code>[[private]] _array1 {{=}} [1,[[nil]],2]; | ||
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<dd class="note"> | <dd class="note"> | ||
When comparing with nil result is [[Nothing]]. | When comparing with nil result is [[Nothing]]. | ||
<code>nil isEqualTo | <code>nil isEqualTo player;</code> | ||
Returns [[Nothing]] instead of expected [[false]] | Returns [[Nothing]] instead of expected [[false]] | ||
<code>diag_log [nil | <code>diag_log [nil isEqualTo [[player]]];</code> | ||
Will print {{hl|[bool]}} | Will print {{hl|[bool]}} | ||
</dd> | </dd> | ||
</dl> | </dl> | ||
Revision as of 11:10, 12 May 2022
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 = compile "123"; _b = compileFinal "123"; _a isEqualTo _b; // false
Syntax
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 falsediag_log [nil isEqualTo player];Will print [bool]