isPropertyEmpty: Difference between revisions

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{{stub|Examples using the new functionality.}}
{{MacroFunction
{{MacroFunction
|name=isPropertyEmpty
|name=isPropertyEmpty
|version=1.3b48
|description=
|description=
Returns 1 if the [[Token:token property|token property]] for the [[Token:Current Token|Current Token]] is empty. A [[Token:token property|token property]] is empty if it is null, if an empty string ("") has been assigned to it, it is not considered empty.
Returns {{true}} if the [[Token Property]] for a specific [[Token]] is empty. A [[Token Property]] is considered empty if it is {{code|NULL}}; if an empty string ({{code|""}}) has been assigned to it, it is not considered empty.
 
'''Note:''' If the token type sets a default value, this function will still see the property as empty. Try using [[json.isEmpty|json.isEmpty()]].


|usage=
|usage=
<source lang="mtmacro" line>
<syntaxhighlight lang="mtmacro" line>
[h: empty = isPropertyEmpty("propertyName")]
isPropertyEmpty(property)
</source>
isPropertyEmpty(property, id)
isPropertyEmpty(property, id, mapname)
</syntaxhighlight>
'''Parameters'''
{{param|property|The name of the property that has its value checked.}}
{{param|id|The token {{code|id}} of the token that has its value checked, defaults to the [[Current Token]]. {{TrustedParameter}} }}
{{param|mapname|The name of the map to find the token.  Defaults to the current map.}}
 


|example=
|example=
<source lang="mtmacro" line>
<syntaxhighlight lang="mtmacro" line>
[r, if(isPropertyEmpty("propertyName")): propertyName = someDefaultValue]
[r, if(isPropertyEmpty("propertyName")): propertyName = someDefaultValue]
</source>
</syntaxhighlight>
 
|also=
[[resetProperty|resetProperty()]],
[[getProperty|getProperty()]],
[[setProperty|setProperty()]],
[[json.isEmpty|json.isEmpty()]]
|changes=
{{change|1.3b51|Added {{code|id}} parameter option.}}
{{change|1.5.4|Added {{code|mapname}} parameter option.}}
 
}}
}}
[[Category:Token Function]]
[[Category:Token Function]][[Category:Property Function]]

Latest revision as of 20:13, 15 March 2023

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 This article needs: Examples using the new functionality.

isPropertyEmpty() Function

Introduced in version 1.3b48
Returns true(1) if the Token Property for a specific Token is empty. A Token Property is considered empty if it is NULL; if an empty string ("") has been assigned to it, it is not considered empty. Note: If the token type sets a default value, this function will still see the property as empty. Try using json.isEmpty().

Usage

isPropertyEmpty(property)
isPropertyEmpty(property, id)
isPropertyEmpty(property, id, mapname)

Parameters

  • property - The name of the property that has its value checked.
  • id - The token id of the token that has its value checked, defaults to the Current Token.

     Note: This parameter can only be used in a Trusted Macro

  • mapname - The name of the map to find the token. Defaults to the current map.

Example

[r, if(isPropertyEmpty("propertyName")): propertyName = someDefaultValue]

See Also

Version Changes

  • 1.3b51 - Added id parameter option.
  • 1.5.4 - Added mapname parameter option.