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Is Defined Method

The Is Defined method tests if a variable or object property is defined. It returns one of the following values:

• The item is defined. It returns the following value:

  True

• The item is not defined. It returns the following value:

  False

This method is unique to Siebel eScript. For more information, see Make Sure the JavaScript Interpreter Can Run a Function.

Format

defined(var)

Table 101 describes the arguments for the Is Defined method.

Example

The following example includes two uses of the Is Defined method. The first use examines a variable named t. The second use examines an object named 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");

Related Topics

For more information, see Undefine Method.