Join Two Arrays in ColdFusion

Question

Is there a built-in way to join two arrays in ColdFusion, similar to JavaScript's array.concat()?

Answer 1

Not really, but guess what, just use Java! :)

<cfset foo = [1,2,3]>
<cfset bar = [4,5,6]>
<cfset foo.addAll( bar )>

reference: Java's Collection Interface API.

source: http://www.aliaspooryorik.com/blog/index.cfm/e/posts.details/post/merging-two-arrays-267

Answer 2

If you're using Railo, you can use ArrayMerge (E.g. <cfset NewArray=ArrayMerge(FirstArray,SecondArray)>).

Answer 3

In javascript array.join(s) creates a string out of all of the elements of the array separated by the delimiter s. A similar function to this in ColdFusion is the ArrayToList function. As far as appending an array to another I don't believe there is a CF function for that. Check http://livedocs.adobe.com/coldfusion/8/htmldocs/help.html?content=functions-pt0_03.html#3473387 to see the list of Array functions in CF. Or try something like this:

<cfscript>
   for(index = 1; index LTE ArrayLen(array2); i = i + 1) {
      ArrayAppend(array1, array2[i]);
  }
</cfscript>