count: Difference between revisions

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m (Text replacement - "<code>([^ ]*)\{\{cc\|([^ ]*)\}\}([^ ]*)<\/code>" to "<code>$1// $2$3</code>")
m (Text replacement - "\{\{cc\|([^} ]*)\}\}" to "// $1")
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|r2= [[Number]]
|r2= [[Number]]


|x1= <code>[[count]] [0, 0, 1, 2]; {{cc|returns 4}}
|x1= <code>[[count]] [0, 0, 1, 2]; // returns 4
[[count]] [[units]] [[group]] [[player]]; {{cc|returns number of units in player group}}</code>
[[count]] [[units]] [[group]] [[player]]; // returns number of units in player group</code>


|x2= <code>[[private]] _cnt = { [[Magic Variables#x|_x]] == 4 } [[count]] [1, 9, 8, 3, 4, 4, 4, 5, 6]; {{cc|returns 3}}
|x2= <code>[[private]] _cnt = { [[Magic Variables#x|_x]] == 4 } [[count]] [1, 9, 8, 3, 4, 4, 4, 5, 6]; // returns 3
_cnt = { [[alive]] [[Magic Variables#x|_x]] } [[count]] [[allUnits]]; {{cc|returns the number of alive units}}</code>
_cnt = { [[alive]] [[Magic Variables#x|_x]] } [[count]] [[allUnits]]; // returns the number of alive units</code>


|x3= <code>private _cnt = count (configFile [[config greater greater name|>>]] "CfgVehicles");</code>
|x3= <code>private _cnt = count (configFile [[config greater greater name|>>]] "CfgVehicles");</code>
Line 87: Line 87:
<code>[[if]] ({ [[if]] ('''_x fulfills condition''') exitWith {1}; false } [[count]] _array [[isEqualTo]] 1) [[then]]
<code>[[if]] ({ [[if]] ('''_x fulfills condition''') exitWith {1}; false } [[count]] _array [[isEqualTo]] 1) [[then]]
{
{
{{cc|do whatever here}}
// do whatever here
};</code>
};</code>
This code will exit the ''count'' loop as soon as it finds an element fulfilling the condition, leaving the ''count'' with the value of 1, hence make the larger if-condition be ''true''.<br>
This code will exit the ''count'' loop as soon as it finds an element fulfilling the condition, leaving the ''count'' with the value of 1, hence make the larger if-condition be ''true''.<br>
Line 99: Line 99:
Quit loop at first fulfilled condition (same as above but faster):
Quit loop at first fulfilled condition (same as above but faster):
<code>{[[if]] (_x == 4) [[exitWith]] {
<code>{[[if]] (_x == 4) [[exitWith]] {
{{cc|do something when we reach 4}}
// do something when we reach 4
<nowiki>}}</nowiki> [[count]] [1,2,3,4,5,6];</code>
<nowiki>}}</nowiki> [[count]] [1,2,3,4,5,6];</code>
</dd>
</dd>
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     if (_x [[isEqualTo]] 3) [[exitWith]] { "Hello" }
     if (_x [[isEqualTo]] 3) [[exitWith]] { "Hello" }
} [[count]] [1,2,3,4,5];
} [[count]] [1,2,3,4,5];
{{cc|_result {{=}} "Hello"}}</code>
// _result {{= "Hello"}}</code>
</dd>
</dd>


Revision as of 12:26, 12 May 2022

Logo A0.png1.00ofpe logo.png1.00Logo A1 black.png1.00Logo A2.png1.00A2 OA Logo.png1.50tkoh logo small.png1.00Arma 3 logo black.png0.50
Hover & click on the images for description

Description

Description:
Can be used to count:
  • The number of elements in an array (returns the already internally known array size)
  • The number of elements in an array matching the condition
  • The number of sub-entries in a config entry
  • Arma 3 logo black.png1.28 The number of characters in an ANSI string
    ⓘ
    If Unicode support is desired, see forceUnicode.
Groups:
ArraysStringsConfigHashMap

Syntax

Syntax:
count value
Parameters:
value: Array, String, Config or HashMap
Return Value:
Number

Alternative Syntax

Syntax:
condition count array
Parameters:
condition: Code - Condition that must return true for the tested element to be counted. The variable _x will contain the currently tested element
Arma 3
If array contains different data types, use isEqualTo instead of ==!
array: Array
Return Value:
Number

Examples

Example 1:
count [0, 0, 1, 2]; // returns 4 count units group player; // returns number of units in player group
Example 2:
private _cnt = { _x == 4 } count [1, 9, 8, 3, 4, 4, 4, 5, 6]; // returns 3 _cnt = { alive _x } count allUnits; // returns the number of alive units
Example 3:
private _cnt = count (configFile >> "CfgVehicles");
Example 4:
hint str count "japa is the man!"; // 16
Example 5:
if (count _myHashMap < 1) then { hint "empty hashmap!"; };

Additional Information

See also:
apply select in find countFriendly countEnemy countUnknown countSide countType findIf forceUnicode

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 August 3, 2006 - 14:27
hardrock
Notes from before the conversion:
Use this to calculate how many "M16" mags a soldier has left. { _x == "M16" } count magazines soldier1; Take care when using count to determine how many units are left alive in a group: count units group player or count units groupname Will return the number of units the leader of the group thinks are alive. If some units have been killed out of sight of other members of the group then it may take sometime for this to be the actual numbers in the group. To determine exactly how many units are really alive in a group use: { alive _x } count units group player; or { alive _x } count units groupname;
Posted on December 15, 2014 - 00:01 (UTC)
Heeeere's Johnny!
count can be (ab)used for a very fast and simple check if at least one element in an array fulfills a certain condition: if ({ if (_x fulfills condition) exitWith {1}; false } count _array isEqualTo 1) then { // do whatever here }; This code will exit the count loop as soon as it finds an element fulfilling the condition, leaving the count with the value of 1, hence make the larger if-condition be true.
If no array element fulfills the condition, the count will be 0 and the if-condition will be false.
Posted on December 29, 2014 - 21:23 (UTC)
Killzone Kid
Quit loop at first fulfilled condition (same as above but faster): {if (_x == 4) exitWith { // do something when we reach 4 }} count [1,2,3,4,5,6];
Posted on January 2, 2015 - 22:32 (UTC)
Heeeere's Johnny!
Using exitWith inside a count loop will overwrite the default functionality and make count return whatever the exitWith returns: _result = { if (_x isEqualTo 3) exitWith { "Hello" } } count [1,2,3,4,5]; // _result Template:= "Hello"
Posted on August 22, 2016 - 19:41 (UTC)
Ebay
With the alternative syntax each iteration should result in an interior return of bool or nothing. Example: createDialog "RscFunctionsViewer"; { lbAdd [292901, _x]; } count ["first", "second", "third"]; lbAdd returns a number, so this throws "Error Type Number, expected Bool". Tested in A2OA 1.63.131129
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