VectorConcat4.as

/** 
 * So, if I want to create a new Vector.<int> that 
 * appends 3, 2, 1 without modifying the original, 
 * I need to create *another* new Vector.<int>, just 
 * to pass the values to concat(). That's one extra
 * Vector.<int> instantiation. Three total Vector.<int> 
 * objects, while only 2 should be needed:
 *   -- One, the original vec:Vector.<int>.
 *   -- Two, the new <int>[ 3, 2, 1 ] to pass the concat() 
 *      parameter.
 *   -- Three, the result:Vector.<int>
 */
var vec:Vector.<int> = new <int>[ 1, 2, 3 ];
var result:Vector.<int> = vec.concat( new <int>[ 3, 2, 1 ] );
trace(result);
 
/** 
 * Or, we can save the trouble of creating an extra 
 * Vector.<int> by shallow copy and appending the 
 * 3, 2, 1 manually:
 */
var vec:Vector.<int> = new <int>[ 1, 2, 3 ];
 
// Shallow Vector.<int> copy
var result:Vector.<int> = vec.concat(); 
result.push(3, 2, 1);
trace(result);
// Outputs: 1,2,3,3,2,1