a or b: Difference between revisions

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| Returns [[true]] only if one or 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 [[true]], evaluation of the right side is skipped completely).
| Returns [[true]] only if one or 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 [[true]], evaluation of the right side is skipped completely).


Identical to: a [[or]] b |= Description
Identical to: a [[or]] b |DESCRIPTION=
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| a '''<nowiki>||</nowiki>''' b |= Syntax
| a '''<nowiki>||</nowiki>''' b |SYNTAX=
|p1= a: [[Boolean]] - Test condition or variable that returns [[Boolean]]. |= Parameter 1
|p1= a: [[Boolean]] - Test condition or variable that returns [[Boolean]]. |= Parameter 1
|p2= b: [[Boolean]] - Test condition or variable that returns [[Boolean]]. |= Parameter 2
|p2= b: [[Boolean]] - Test condition or variable that returns [[Boolean]]. |= Parameter 2
| [[Boolean]] |= Return value
| [[Boolean]] |RETURNVALUE=






|s2= a '''<nowiki>||</nowiki>''' {b} &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(''Available since ArmA 2:OA v1.62.'') |= Syntax
|s2= a '''<nowiki>||</nowiki>''' {b} &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(''Available since ArmA 2:OA v1.62.'') |SYNTAX=
|p21= a: [[Boolean]] - Test condition or variable that returns [[Boolean]]. |= Parameter 1
|p21= a: [[Boolean]] - Test condition or variable that returns [[Boolean]]. |= Parameter 1
|p22= b: [[Boolean]] - Test condition or variable that returns [[Boolean]]. It is not evaluated if '''a''' returns as [[true]]. |= Parameter 2
|p22= b: [[Boolean]] - Test condition or variable that returns [[Boolean]]. It is not evaluated if '''a''' returns as [[true]]. |= Parameter 2
|r2= [[Boolean]] |= Return value
|r2= [[Boolean]] |RETURNVALUE=
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| [[or]], [[and]], [[Operators]]  |= See also
| [[or]], [[and]], [[Operators]]  |SEEALSO=
|mp= no special considerations|=
|mp= no special considerations|=
}}
}}

Revision as of 11:24, 7 April 2019

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Description

Description:
Returns true only if one or both conditions are true. In case of the alternative syntax, lazy evaluation is used (if left operand is true, evaluation of the right side is skipped completely). Identical to: a or b
Multiplayer:
no special considerations
Groups:
Uncategorised

Syntax

Syntax:
a || b
Parameters:
a: Boolean - Test condition or variable that returns Boolean.
b: Boolean - Test condition or variable that returns Boolean.
Return Value:
Boolean

Alternative Syntax

Syntax:
a || {b}        (Available since ArmA 2:OA v1.62.)
Parameters:
a: Boolean - Test condition or variable that returns Boolean.
b: Boolean - Test condition or variable that returns Boolean. It is not evaluated if a returns as true.
Return Value:
Boolean

Examples

Example 1:
if ((OBJ1) || (_enemycount == 0)) then {hint "you win !"}
Example 2:
if ((count _array == 0) || {(_array select 0) != player}) then {hint "It works! Without lazy evaluation it would throw an error if array was empty."}

Additional Information

See also:
orandOperators

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

Notes

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