findIf: Difference between revisions
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{{Command|Comments= | {{Command|Comments= | ||
| arma3 |Game name= | | arma3 |Game name= | ||
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|gr1= Arrays |GROUP1= | |gr1= Arrays |GROUP1= | ||
| Searches for an element within array for which the code evaluates to true. | | Searches for an element within array for which the code evaluates to true. | ||
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{{Informative|[[findIf]] terminates as soon as it finds an element that fulfills the condition, thus it is more efficient than [[count]] in scenarios where you need to check for presence / absence of at least one element that evaluates to true.}} |Description= | {{Informative|[[findIf]] terminates as soon as it finds an element that fulfills the condition, thus it is more efficient than [[count]] in scenarios where you need to check for presence / absence of at least one element that evaluates to true.}} |Description= | ||
| array [[findIf]] code |Syntax= | | array [[findIf]] code |Syntax= | ||
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| [[Number]] - Zero-based position of the first array element for which the code evaluate to true, -1 if not found |Return value= | | [[Number]] - Zero-based position of the first array element for which the code evaluate to true, -1 if not found |Return value= | ||
|x1= <code>[unit1, unit2, unit3] [[findIf]] {[[not]] [[alive]] [[_x]]}; {{codecomment|// return index of the first dead unit)}}</code> |Example 1= | |x1= <code>[unit1, unit2, unit3] [[findIf]] {[[not]] [[alive]] [[_x]]}; {{codecomment|// return index of the first dead unit)}}</code> |Example 1= | ||
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[[waitUntil]] { [unit1, unit2, unit3] [[findIf]] {[[alive]] [[_x]]} == -1 }; {{codecomment|// fast, terminates as soon as it finds a living unit}} | [[waitUntil]] { [unit1, unit2, unit3] [[findIf]] {[[alive]] [[_x]]} == -1 }; {{codecomment|// fast, terminates as soon as it finds a living unit}} | ||
[[waitUntil]] { {[[alive]] [[_x]]} [[count]] [unit1, unit2, unit3] == 0 }; {{codecomment|// slow, always goes through all array elements}}</code> |Example 2= | [[waitUntil]] { {[[alive]] [[_x]]} [[count]] [unit1, unit2, unit3] == 0 }; {{codecomment|// slow, always goes through all array elements}}</code> |Example 2= | ||
| [[find]] [[count]] |See also= | | [[find]] [[count]] |See also= | ||
Revision as of 02:22, 17 January 2021
Description
- Description:
- Searches for an element within array for which the code evaluates to true. Returns the zero-based index on success or -1 if not found. Code on the right side of the command is evaluated for each element of the array, processed element can be referenced in code as _x.
- Groups:
- Arrays
Syntax
- Syntax:
- array findIf code
- Parameters:
- array: Array - array to search in
- code: Code - code defining an element to find, processed element can be referenced within the code as _x
- Return Value:
- Number - Zero-based position of the first array element for which the code evaluate to true, -1 if not found
Examples
- Example 1:
[unit1, unit2, unit3] findIf {not alive _x}; // return index of the first dead unit)- Example 2:
// two ways how to 'wait for all units to be dead': waitUntil { [unit1, unit2, unit3] findIf {alive _x} == -1 }; // fast, terminates as soon as it finds a living unit waitUntil { {alive _x} count [unit1, unit2, unit3] == 0 }; // slow, always goes through all array elements
Additional Information
Notes
-
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