isNil

-wrong parameter ("Arma") defined!-1.00

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Description

Description:

Tests whether the variable defined by the String argument is undefined, or whether an expression result passed as Code is undefined.
The command returns true if the variable or the expression result is undefined (i.e. the expression result is Nothing), and false in all other cases.

ⓘ

1.00 isNil doesn't exist in Operation Flashpoint, you can emulate it:

// SQS syntax
_nil = format ["%1", _undefinedVariable]
? (format ["%1", foo] == _nil) : foo = "Hello World!"

// SQF syntax
_nil = format ["%1", _undefinedVariable];
if (format ["%1", foo] == _nil) then { foo = "Hello World!"; };

Groups:

Uncategorised

Syntax

Syntax:

isNil variableName

Parameters:

variableName: String - name of a missionNamespace variable (e.g "someVar") or a local variable (e.g "_someVar")

Return Value:

Boolean - true if variable is nil

Alternative Syntax

Syntax:

isNil code

Parameters:

code: Code - code to evaluate:

• the code will be executed; isNil { player setDamage 1; }; will kill the player
• the code will not be allowed to suspend while expression code is evaluated, even if the parent scope allows it.

 

Return Value:

Boolean - true if code returns something other than Nothing

Examples

Example 1:

if (isNil "pokus") then { pokus = 0; };

Example 2:

isNil { player getVariable "someVar" };

Example 3:

_myArray = [0, 1]; isNil { _myArray select 0 }; // returns false isNil { _myArray select 1 }; // returns false isNil { _myArray select 2 }; // returns true isNil { _myArray select 3 }; // throws a script error. only length+1 select is allowed

Additional Information

See also:

nilVariables

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