I'm taking down this post. I just posted this as a side comment to explain a sentence on my latest blog post. This wasn't meant to be #1 on HN to start a huge war on functional programming... The thoughts are not well formed enough to have a huge audience. Sorry for all the people reading this. And please, don't dig through the history...
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Ocaml / functional programming
Worth reading the history on this one
He is right, this is exactly how I felt when I first switched to functional programming.
Nevertheless, with time, you start to adapt yourself and get it and FP starts to make sense.
Although, I still dislike the way FP people thinks brevity increase readability... I mean look at APL, it is short.
Furthermore the examples they pick are always too simplistic to make a point.
Finally, the performance of FP is something I am very interested in and I was never able to found something about it.
I am also worried about the cache unfriendliness of lists but everybody seems to forget about processor cache when working on distributed systems, on a other side Scala does allow you to use arrays instead of lists and I am mainly using arrays anyway.
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There is a lot of really good reasons why functional programming isn't good for every use-case. It would be meaningless to enumerate them here as they're obvious if you take a bit of time to look for them. This gist (unfortunately) doesn't make any good arguments against using the paradigm :(