Comments on: Erlang FizzBuzz Showdown (Pt 1)

By: iWantToKeepAnon

iWantToKeepAnon — Sat, 16 May 2009 03:48:16 +0000

> I was a little surprised that I
> couldn’t just launch into it.

More like *chose* not to. Sounds like a list comprehension would have worked fabulously. Just cuz you *wanted* to show tail recursion doesn't mean there ISNT a built in language construct. List comprehensions are a WONDERFUL way to go about what you just did manually.

Also I don't think you need the gaurd ... when 'range(To,To,List)' matches there will be no more recursion. In fact that is the classic way to STOP a loop. Hmmmm.... am I missing something?

This isn't a bad intro but slightly off center IMO.

list comprehension:

init() ->
[word(X) || X <- lists:seq(1, 100)].

(for a proper definition of 'word()' and you could replace lists:seq w/ a roll your own tail recursion if you wanted to illustrate that).

By: joelhughes

joelhughes — Thu, 14 May 2009 19:17:39 +0000

Thanks Daniel, I was aware of the lists module but chose not to use it in order to cover the basics of tail-recursion (and compare the implementation with Python/PHP/Ruby).

I hope that clarifies it a bit.

By: Daniel Hepper

Daniel Hepper — Thu, 14 May 2009 19:01:37 +0000

Instead of building your own range function, you could use lists:seq(From, To)

http://www.erlang.org/doc/man/lists.html#seq-2

By: Joel Hughes’s Blog » Erlang FizzBuzz Showdown (pt2)

Joel Hughes’s Blog » Erlang FizzBuzz Showdown (pt2) — Thu, 14 May 2009 11:39:34 +0000

[...] my last post I documented some of the steps involved in building a simple FizzBuzz script in Erlang and compared the code to its equivalents in Python, Ruby and PHP. So far we’ve simply covered [...]