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< Erlang ~ Noob Questions |
| ryanisinallofus |
 Posted: Thu Nov 19, 2009 11:06 pm |
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Joined: 19 Nov 2009
Posts: 2
Location: Seattle
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Emacs seems to be the preferred editor - is that right?
Mac OSX seems to kind of suck for Erlang development. No binary (easy enough to compile), mac ports is always outdated, the macports version of emacs didn't come with the erlang-mode for some reason (not to mention the missing meta key). Is linux the preferred or (gasp!) windows?
I can't figure out what the pipe is for:
-module(lib_misc).
-export([sum1, sum/2]).
sum(L) -> sum(L, 0).
sum([], N) -> N;
sum([H|T]), N) -> sum(T, H+N).
I understand that H = head, T = Tail, but how is the tail used? And links to explain it? I'm at used to it at all.
Thanks in advance. I'm just reading through Programming Erlang right now. |
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| Karalabe |
| Posted: Thu Nov 19, 2009 11:24 pm |
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Joined: 03 Jul 2009
Posts: 11
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The most straightforward development OS (for Erlang) I'd say is linux. And yes, people tend to prefer Emacs as it's easy to extend. Nonetheless I personally use Eclipse + ErlIDE, which in my opinion is a very powerful combination. It is still under heavy development, but it's completely stable and usable.
Pipes are used to separate the "tail" of the list from the few elements at the beginning (head). For example the list [1, 2, 3] could be also written [1, | [2, 3]] or [1, 2 | [3]] or even [1, 2, 3 | []]. Basically when you match a list, you can specify a couple of elements at the beginning (separated by commas), followed by all the rest (tail) separated from the head elements by a pipe. The tail will be a single list containing everything after the first few elements specified. |
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| ryanisinallofus |
| Posted: Fri Nov 20, 2009 1:39 am |
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Joined: 19 Nov 2009
Posts: 2
Location: Seattle
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I have grown tired of Apple and their OS. It's nice that most things *just-work* but I have been looking for an excuse to go back to Linux anyway.
As for the pipe explanation - THANKS. This did it for me right here:
"For example the list [1, 2, 3] could be also written [1, | [2, 3]] or [1, 2 | [3]] or even [1, 2, 3 | []]." |
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