From: Jason Roelofs <jameskilton@...>
Date: 2008-01-04T09:06:29+09:00
Subject: Re: Troubles with blocks

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On Jan 3, 2008 6:49 PM, Holden Holden <pyarnau@gmail.com> wrote:

> Hi,
>
> I am a Python programmer and I've just started learning Ruby. Until now,
> I've enjoyed it, but I am having troubles with some methods that require
> blocks.
>
> This is a simple example that (I expect) summarizes my problems - how to
> obtain a list of pairs [index, value] (or [value, index], it doesn't
> matter) from an array:
>
> Python:
>
> list(enumerate(['a','b','c']))
> => [(0, 'a'), (1, 'b'), (2, 'c')]
>
> Ruby:
>
> t = []; ['a','b','c'].each_with_index { |*x| t << x }; t
> => [["a", 0], ["b", 1], ["c", 2]]
>
> Which is a very ugly solution. How could I do this on Ruby without a
> temporal variable?
>
> thanks
> --
> Posted via http://www.ruby-forum.com/.
>
>
Hmm, I can't find a shorter way than what you've got. Why are you trying to
get this kind of information? Maybe there's something earlier in your code
that can be made more Ruby-esque to make this easier for you.

Jason

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