MULTEXT - Document MQL2. SgmlQL reference/Operators.
Empty

The operator empty() returns TRUE if set is empty, FALSE otherwise.

Prototype

boolean <-- empty(set)

Examples

  • empty(attr(first FILEDESC within file $myfile));
  • TRUE
  • empty(top DATE within file $myfile);
  • FALSE
    



    | Top | Next | SgmlQL reference | LPL/CNRS | MULTEXT

    Copyright © Centre National de la Recherche Scientifique, 1997.