The values returned by functions are evaluated inside expressions using operators. The type of operator used depends upon the data type of the value the function returns.
Data type | Operator |
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any data type | Equal to: '==' Not equal to: '!=' Null: 'empty' Not null: 'not empty'
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dates and numbers | |
strings | Starts with: 'startswith' Ends with: 'endswith' Contains: 'contains' Contains, ignoring upper or lowercase: 'containsignorecase' Regular expression: 'regex'
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