param

Game1 needed - Version1 needed

Hover & click on the images for description

Description

Description:

Description needed

Groups:

VariablesArrays

Syntax

Syntax:

param [index, defaultValue, expectedDataTypes, expectedArrayCount]

Parameters:

[index, defaultValue, expectedDataTypes, expectedArrayCount]: Array

index: Number - index of required item in the input array.

defaultValue (Optional): Anything - a default value to return if input is undefined, of the wrong type or of the wrong length (if the item is an array).

expectedDataTypes (Optional): Array of direct Data Types - checks if passed value is one of listed Data Types. If not, default value is used instead. Empty array [] means every data type is accepted.

expectedArrayCount (Optional): Number or Array - a single size or array of sizes. If passed input value is an array, checks that it has a certain number of elements. If not, default value is used instead. Empty array [] means any size is accepted.

Return Value:

Return value needed

Alternative Syntax

Syntax:

argument param [index, defaultValue, expectedDataTypes, expectedArrayCount]

Parameters:

argument: Anything - A usual array of params is expected. If a non-array value is passed, it will be converted to 1 element array

[index, defaultValue, expectedDataTypes, expectedArrayCount]: Array

index: Number - index of required item in the input array.

defaultValue (Optional): Anything - a default value to return if input is undefined, of the wrong type or of the wrong length (if the item is an array).

expectedDataTypes (Optional): Array of direct Data Types - checks if passed value is one of listed Data Types. If not, default value is used instead. Empty array [] means every data type is accepted.

expectedArrayCount (Optional): Number or Array - a single size or array of sizes. If passed input value is an array, checks that it has a certain number of elements. If not, default value is used instead. Empty array [] means any size is accepted.

Return Value:

Anything - extracted value on success or default value otherwise. Nothing if syntax error occurred.

Examples

Example 1:

[1, 2, 3] call { private _one = param [0, 1]; private _two = param [1, 2]; private _three = param [2, 3]; // ... };

Example 2:

[123] call { private _val = param [0]; }; // Below would produce the same result as above 123 call { private _val = param [0]; };

Example 3:

_z = position player param [2, 0]; if (_z > 10) then { hint "YOU ARE FLYING!"; };

Example 4:

fnc = { private _pos = param [0, [0,0,0], [objNull, []], [2,3]]; private _rad = param [1, 0, [0]]; _pos nearObjects _rad; }; [position player, 25] call fnc; // ok [player, 25] call fnc; // ok [25, player] call fnc; // default values are used

Additional Information

See also:

paramsselectsetresizereverseinfindfindIftoArraytoStringforEachcountdeleteAtdeleteRangeappendsortarrayIntersectsplitStringjoinStringisEqualTypeAllisEqualTypeisEqualTypeParamsisEqualTypeArrayisEqualTypeAnytypeNameBIS_fnc_param

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 November 8, 2016 - 07:50 (UTC)

Demellion

You can also use param in a complex with another commands. For example call, compile and format: ["var = 2"] call { call compile format ["%1", param [0,"",[""]]]; // compiled param string value hint str (var); // 2 };