Join Two Arrays in ColdFusion

CF10+, use

arrayAppend(array1, array2, true);

https://helpx.adobe.com/coldfusion/cfml-reference/coldfusion-functions/functions-a-b/arrayappend.html

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

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