CSet:Copy

The Copy method duplicates the CSet and returns the new copy.

Syntax

S = CSet:Copy()

where

S is a new CSet containing the same members as the current one.

This method copies an existing CSet and returns a reference to the new CSet. You cannot copy a CSet or other class object using the trivial statement B = A, as this simply makes the value of B a reference to the object A. In other words, B becomes an alias to A. To get around this, two copy methods are provided by the CSet class:

To create a CSet that is a copy of the current object, use the Copy method. This creates a new CSet B before duplicating the values of the current object. For example,

B = A:Copy()

-- CSet A already exists

To create a new CSet that is a copy of an existing object, use the copy constructor, as in

B = CSet:new(A)

-- CSet A already exists

Choose the syntax that fits best with your script.

Example

The following fragment duplicates the CSet.

S = CSet:new()	-- create a CSet
S:Add("First")	-- add a string to the set
S:Add("Second")	-- add a string to the set
S:Add("Third")	-- add a string to the set
T = S:Copy	-- creates a duplicate CSet named T
Printf("N= %d", T:Count())	-- Result: N = 3