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defined() Method

This function tests whether a variable or object property has been defined.

Syntax

defined(var)

Returns

True if the item has been defined; otherwise, false.

Usage

This function tests whether a variable or object property has been defined, returning true if it has or false if it has not.

CAUTION:  The defined() function is unique to Siebel eScript. Before using it, confirm that the JavaScript interpreter that will run the script supports Siebel eScript functions. Avoid using this function in a script that may be used with a JavaScript interpreter that does not support it.

Example

The following fragment illustrates two uses of the defined() method. The first use checks a variable, t. The second use checks an object t.t.

var t = 1;
   if (defined(t))
      TheApplication().Trace("t is defined");
   else
      TheApplication().Trace("t is not defined");

   if (!defined(t.t))
      TheApplication().Trace("t.t is not defined"):
   else
      TheApplication().Trace("t.t is defined");

See Also

undefine() Method