From: Matthew Moss <matthew.moss.coder@...>
Date: 2006-04-01T07:41:11+09:00
Subject: Re: How does ?A return the ASCII value of A ?

> def foo(a, b, c)
>   "a:#{a}  b:#{b}  c:#{c}"
> end
=> nil

> foo(1, 2, 3)
=> "a:1  b:2  c:3"

> x = [4, 5, 6]
=> [4, 5, 6]

> foo(x)
ArgumentError: wrong number of arguments (1 for 3)

> foo(*x)
=> "a:4  b:5  c:6"


On 3/31/06, coachhilton@gmail.com <coachhilton@gmail.com> wrote:
> Very cute.  I hopped onto irb to check out what each step of
> Hash[*keys.zip(vals).flatten] does (I'd not used zip nor flatten in
> some time) and I can't quite figure out what  function asterisk, ie,
> *keys performs (leaving it out or executing *keys.zip(vals).flatten
> results in a ruby error and I don't see an explanation of this use of *
> in the nutshell book.)  Can one of you enlighten me?