From Bohemia Interactive Community
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| A variable of type '''Nothing''' is an '''undefined variable'''. When converted to a string with [[str]] or [[format]], this variable will always return [[scalar bool array string 0xe0ffffef]] (in [[Armed Assault]]) or [[scalar bool array string 0xfcffffef]] (in [[Operation Flashpoint]]).
| | An expression of type '''Nothing''' is no value. It cannot be assigned to a variable. It exists because each expression needs to return some value and needs to have some clearly identified [[:Category:Data Types|type]]. |
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| == Undefining Variables ==
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| You can use [[nil]] to undefine variables.
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| myVar = 1;
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| ...
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| myVar = nil;
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| myVar => undefined
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| == Comparisons ==
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| No comparison with variables of this type will work.
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| '''Example:'''
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| // error
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| [[if]] (undefinedVar == ...) [[then]] ...
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| // error
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| [[if]] (undefinedVar == undefinedVar) [[then]] ...
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| | Its presence can be checked using [[isNil]]. |
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| [[Category: Magic Types]] | | [[Category: Magic Types]] |
Latest revision as of 19:42, 22 December 2014
An expression of type Nothing is no value. It cannot be assigned to a variable. It exists because each expression needs to return some value and needs to have some clearly identified type.
Its presence can be checked using isNil.
