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Property [other Property type actions]
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5.7.0
List.size()
This returns the number of discrete values in a List/Set. The returned number can be coerced to a string. Trailing parentheses are optional for this property. Examples:
$MyList = "hello;world"; $MyStringA = $MyList.size;
$MyStringA is now "2".
This property is the same evaluation as count(list).
This operator can also be used on other attribute data types that are string-like, URL, File, etc.