I got a new job in December. This company mostly uses Ruby and PHP. I was given an assignment for which they scheduled 2 weeks. I wrote the whole thing in Clojure, my new favorite language. I got it done in 1 week (6 days). After I was done, I asked if it was okay if I used Clojure. The folks I work with had no problem with that. They asked were impressed with my speed, part of which I attribute to Clojure.
I am the first person in this company to use Clojure, (although there is a small team in London that now uses Scala, and there is an official goal to move toward JVM technologies). I use it because it lets me work very fast. I have spent many years writing Ruby and PHP. I used to use them because I thought they were fast, and Java was slow. But one's point of reference shapes one's preferences.
Let me put it like this: I started using PHP in 1999. At that time, I felt strongly that this was the easiest way to write web apps. Java was verbose. The Struts framework was monstrous to the point of being offensive. Perl was ugly. I had never heard of Ruby. I became an evangelist for PHP, trying to convince companies that its use would make web development much more pleasant and faster.
Later I did some Ruby On Rails development. I like this language, though I have never understood the smug sense of superiority of some Rails developers, especially in their attitude toward PHP. In my mind, these are 2 similar languages with slightly different strengths and weaknesses, but at roughly the same level of power.
PHP was for a long time a Wild West of development. Every developer built their own CMS and then used it for everything. At some point after 2006, this changed. Ruby On Rails was a huge influence. By 2008, the only jobs I could find, for either Ruby or PHP, were using monolithic frameworks: Rails, Symfony, Drupal or Cake. I found myself bogged down reading endless documentation. I recall losing whole days trying to track down a bug in Symfony and then finding it was because of a setting in an obscure YAML file. The situation was not as bad as Struts, but I felt that somehow the world had taken a wrong turn. Once upon a time lightweight scripting languages offered freedom from Java and Struts -- and when you make that comparison, both Ruby and PHP seem like heaven. Bruce Eckel summed up the spirit of the change here:
"But for someone who has invested Herculean effort to use EJBs just to baby-sit a database, Rails must seem like the essence of simplicity. The understandable reaction for such a person is that everything they did in Java was a waste of time, and that Ruby is the one true path."
http://www.artima.com/weblogs/viewpost.jsp?thread=141312
To me, Clojure is interesting for 2 different reasons:
1.) the language
2.) the eco-system
The 2 work in combination of course.
When I got done with my 2 week assignment, which I did in 1 week, I ran "lein uberjar" and gave a single binary to the sysadmin, so he could roll it out to the production machines. He asked where the other files were. I said "There are no other files, all the HTML, CSS, Javascript, images and code are in this one file." He asked how to start it. I gave him a simple 1 line startup command. He started it up and was amazed. He said, "That's it?" I said, "That's it." He said "Why can't they all be this easy?" He was used to dealing with complicated Capistrano and Jenkins commands for roll-outs.
To me, Clojure has that simplicity, speed and elegance that I was looking for in 1999, when I stumbled on PHP and decided PHP was the wave of the future.
I suspect the Great Age Of Lisp is still ahead of us. Stuff like Clojure makes me think there is a vast potential here, still waiting to be unlocked.