Skip to main content

Comparing Two Arrays in CFML

This came up yesterday in a discussion with a friend of mine. He had two arrays and he wanted to see if they were identical in terms of order and value of the elements. His first thought was to loop through the arrays and compare each element, but since CFML arrays are really Java arrays, there's a much simpler way.

arrray1 = ArrayNew(1);
array1[1] = "foo";
array1[2] = "bar";

array2 = ArrayNew(1);
array2[1] = "foo";
array2[2] = "bar";

arraysAreEqual = array1.equals(array2);

The equals() method on the array returns a boolean and tells you whether or not the arrays are identical in terms of the values and ordering of the array elements. Note that if the values are identical but in a different order, the arrays will not be considered equal, so sort before doing this test if there's a chance things might be in a different order between the two arrays.


ElliottZ said…
Note that this is case sensitive, and has unexpected results on arrays of non strings, even if they are "simple" values in CF. CF stores numbers, dates and booleans as strings, java equivalent types or numbers depending on lots of factors.a1 = arrayNew(1);a1[1] = 1+0;a2 = arrayNew(1);a2[1] = 1; // Not equal, but "equal" in CF sense.assertFalse( a1.equals(a2) );You'd be better off writing your own function. There's too many cases where equals() will return false.
Matthew Woodward said…
In this case it was all strings. I would expect it to be case sensitive, but good point about the numeric data types. I still think it's handy for strings though.
Matthew Woodward said…
Actually the example you provided works correctly in OpenBD, so the issue with numeric datatypes must be specific to Adobe CF.

Popular posts from this blog

Installing and Configuring NextPVR as a Replacement for Windows Media Center

If you follow me on Google+ you'll know I had a recent rant about Windows Media Center, which after running fine for about a year suddenly decided as of January 29 it was done downloading the program guide and by extension was therefore done recording any TV shows.

I'll spare you more ranting and simply say that none of the suggestions I got (which I appreciate!) worked, and rather than spending more time figuring out why, I decided to try something different.

NextPVR is an awesome free (as in beer, not as in freedom unfortunately ...) PVR application for Windows that with a little bit of tweaking handily replaced Windows Media Center. It can even download guide data, which is apparently something WMC no longer feels like doing.

Background I wound up going down this road in a rather circuitous way. My initial goal for the weekend project was to get Raspbmc running on one of my Raspberry Pis. The latest version of XBMC has PVR functionality so I was anxious to try that out as a …

Running a Django Application on Windows Server 2012 with IIS

This is a first for me since under normal circumstances we run all our Django applications on Linux with Nginx, but we're in the process of developing an application for another department and due to the requirements around this project, we'll be handing the code off to them to deploy. They don't have any experience with Linux or web servers other than IIS, so I recently took up the challenge of figuring out how to run Django applications on Windows Server 2012 with IIS.

Based on the dated or complete lack of information around this I'm assuming it's not something that's very common in the wild, so I thought I'd share what I came up with in case others need to do this.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Assumptions and CaveatsThe operating system is Windows Server 2012 R2, 64-bit. If another variant of the operating system is being used, these instructions may not work properly.All of the soft…

Setting Up Django On a Raspberry Pi

This past weekend I finally got a chance to set up one of my two Raspberry Pis to use as a Django server so I thought I'd share the steps I went through both to save someone else attempting to do this some time as well as get any feedback in case there are different/better ways to do any of this.

I'm running this from my house (URL forthcoming once I get the real Django app finalized and put on the Raspberry Pi) using I don't cover that aspect of things in this post but I'm happy to write that up as well if people are interested.

General Comments and Assumptions

Using latest Raspbian “wheezy” distro as of 1/19/2013 (’lll be using Nginx ( as the web server/proxy and Gunicorn ( as the WSGI serverI used heavily as I was creating this, so many thanks to the author of that tutorial. If you’re looking for more details on …