Duplicate

Description

Returns a clone, also known as a deep copy, of a variable. Unlike StructCopy, Duplicate copies the variable, so there is no reference to the original variable.

Syntax

Duplicate(variable_name)

Parameters

Parameter

Description

variable_name
The name of a variable to duplicate

Usage

This function is useful in duplicating complex structures, including nested structures and queries.

Note

You cannot duplicate a COM, CORBA or JAVA object returned from the cfobject tag or the CreateObject function. If an element in an array or a field of a structure is a COM, CORBA, or JAVA object, you cannot duplicate the array or structure. If you try to duplicate an object of this sort, an exception is thrown.

Example

<!--- This example shows the use of Duplicate --->
<html>
<head>
<title>Duplicate Example</title>
</head>

<H3>Duplicate Example</H3>
<cfset s1 = StructNew()>
<cfset s1.nested  = StructNew()>
<cfset s1.nested.item = "original">

<cfset copy = StructCopy(s1)>
<cfset clone = Duplicate(s1)>

<!--- modify the original --->
<cfset s1.nested.item = "modified">
<cfoutput>
<P>The copy contains the modified value: #copy.nested.item#</P>
<P>The duplicate contains the original value: #clone.nested.item#</P>
</cfoutput>
</body>
</html>

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