or: Difference between revisions

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m (Text replacement - "<code>([^ ]*)\[\[([a-zA-Z][a-zA-Z0-9_]+)\]\]([^ ]*)<\/code>" to "<code>$1$2$3</code>")
m (Text replacement - "<sqf>([^↵][^<]*↵[^<]*)<\/sqf>" to "<sqf> $1 </sqf>")
 
(17 intermediate revisions by 2 users not shown)
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|gr2= Variables
|gr2= Variables


|descr= Returns [[true]] if one or both conditions are [[true]]. In case of the alternative syntax, {{Wikipedia|Lazy_evaluation#Control_structures|lazy evaluation}} is used. The means that if left operand is [[true]], evaluation of the right side is skipped completely.
|descr= Returns [[true]] if one or both conditions are [[true]]. In case of the alternative syntax, {{Link|https://en.wikipedia.org/wiki/Lazy_evaluation#Control_structures|lazy evaluation}} is used. That means that if left operand is [[true]], evaluation of the right side is skipped completely.


|alias = [[a or b|a || b]]
|alias = [[a or b|a || b]]
Line 32: Line 32:
|s1= a [[or]] b
|s1= a [[or]] b


|p1= a: [[Boolean]] - Test condition or variable
|p1= a: [[Boolean]] - test condition or variable


|p2= b: [[Boolean]] - Test condition or variable
|p2= b: [[Boolean]] - test condition or variable


|r1= [[Boolean]]
|r1= [[Boolean]]
Line 42: Line 42:
|s2since= arma2oa 1.62
|s2since= arma2oa 1.62


|p21= a: [[Boolean]] - Test condition or variable
|p21= a: [[Boolean]] - test condition or variable


|p22= b: [[Code]] - Code that returns [[Boolean]]. It is not evaluated if ''a'' returns [[true]]
|p22= b: [[Code]] - code that returns [[Boolean]]. It is not evaluated if ''a'' returns [[true]]


|r2= [[Boolean]]
|r2= [[Boolean]]


|x1= <code>if (_obj1 or (_enemycount [[==]] 0) or (not alive _enemyGeneral)) then { hint "you win !"; };</code>
|x1= <sqf>if (_obj1 or (_enemycount == 0) or (not alive _enemyGeneral)) then { hint "you win !"; };</sqf>


|x2= <code>{{cc|without lazy evaluation, [[select]] would throw an error in the event of an empty array}}
|x2= <sqf>
[[if]] (([[count]] _array [[==]] 0) [[or]] { (_array [[select]] 0) [[!=]] [[player]] }) [[then]]
// without lazy evaluation, select would throw an error in the event of an empty array
if ((count _array == 0) or { (_array select 0) != player }) then
{
{
[[hint]] "It works!";
hint "It works!";
};</code>
};
</sqf>


|seealso= [[a or b|a || b]] [[and]] [[Operators]]
|seealso= [[a or b|a || b]] [[and]] [[Operators]]
}}
}}

Latest revision as of 19:42, 3 September 2024

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Description

Description:
Returns true if one or both conditions are true. In case of the alternative syntax, lazy evaluation is used. That means that if left operand is true, evaluation of the right side is skipped completely.
Alias:
a || b
Groups:
MathVariables

Syntax

Syntax:
a or b
Parameters:
a: Boolean - test condition or variable
b: Boolean - test condition or variable
Return Value:
Boolean

Alternative Syntax

Syntax:
a or b
Parameters:
a: Boolean - test condition or variable
b: Code - code that returns Boolean. It is not evaluated if a returns true
Return Value:
Boolean

Examples

Example 1:
if (_obj1 or (_enemycount == 0) or (not alive _enemyGeneral)) then { hint "you win !"; };
Example 2:
// without lazy evaluation, select would throw an error in the event of an empty array if ((count _array == 0) or { (_array select 0) != player }) then { hint "It works!"; };

Additional Information

See also:
a || b and 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
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