Elvis operator

The support has been provided in ColdFusion for the Elvis operator (?:). The Elvis operator is primarily used to assign the ‘right default’ for a variable or an expression.

It returns the resultant value of its left operand's expression, if that resultant value is defined and not null and not a false value. Otherwise, it returns the resultant value of its right operand's expression (the default value).

For instance,

In the above example, if userName is defined and not null and not a false value, it will be assigned to the myDisplayName variable. Otherwise, the value "Anonymous" will be assigned to the myDisplayName variable.

See the following example:

In the above example, if getEmployeeName(ID) does not return any value, or if the returned value is a false value, the value "Joe" will be assigned to the employeeName variable.

Similiarly, you can use this operator for Struct: