a && b: Difference between revisions

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|descr= Returns [[true]] only if both conditions are [[true]].
|descr= Returns [[true]] only if both conditions are [[true]].
In case of the alternative syntax, [http://en.wikipedia.org/wiki/Lazy_evaluation#Control_structures lazy evaluation] is used - if left operand is [[false]], evaluation of the right side is ignored.
In case of the alternative syntax, {{Wikipedia|Lazy_evaluation#Control_structures|lazy evaluation}} is used - if left operand is [[false]], evaluation of the right side is ignored.


|alias= [[a and b]]
|alias= [[a and b]]

Revision as of 15:57, 30 May 2021

Hover & click on the images for description

Description

Description:
Returns true only if both conditions are true. In case of the alternative syntax, lazy evaluation is used - if left operand is false, evaluation of the right side is ignored.
Alias:
a and b
Groups:
VariablesMath

Syntax

Syntax:
booleanA && booleanB
Parameters:
booleanA: Boolean - Test condition or variable
booleanB: Boolean - Test condition or variable
Return Value:
Boolean

Alternative Syntax

Syntax:
boolean && code Template:Since
Parameters:
boolean: Boolean - Test condition or variable
code: Code - Code that once executed returns a Boolean. The code is not evaluated if boolean is false.
Return Value:
Boolean

Examples

Example 1:
private _allEnemiesKilled = true; if (alive player && _allEnemiesKilled) then { hint "you win !"; };
Example 2:
if ((count _array > 0) && { (_array select 0) == player }) then // an error would be thrown without lazy evaluation { hint "It works!"; };
Example 3:
if ((alive player) && { player setDamage 0.5; true }) then // valid as long as the code block returns a Boolean { hint "It works!"; };

Additional Information

See also:
andorOperators

Notes

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