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

In CF 10 or Railo 4, you can use the concat() function of the Underscore.cfc library to get a new array that is a concatenation of two other arrays (without modifying the existing arrays). Example cfscript:

newArray = _.concat([1], [2]);

Result:

// newArray == [1, 2]

Using this method to get a new array is a bit cleaner than creating a new array and calling ArrayAppend on it twice.

(Disclaimer: I wrote Underscore.cfc)

Answer 2

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 3

Yes, ColdFusion(10+) has an inbuilt function to append two arrays.

Script version : array1.append(array2, true);

Tag version: arrayAppend(array1, array2, true);