From: Robert Klemme <bob.news@...>
Date: 2005-10-25T16:22:03+09:00
Subject: Re: Array#to_h

Daniel Sheppard wrote:
> Problem is - which [].to_h is intuitive. There's a to_h in nano:
> 
> http://nano.rubyforge.org/doc/classes/Array.html#M000057
> 
> You can already do:
> 
> a = [1, 2, 3, 4, 5]
> hash = a.inject({}) {|h,x| h[x] = x*2}

Won't work.  This at least has to be

hash = a.inject({}) {|h,x| h[x] = x*2;h}

> Or:
> 
> class Array
> def to_h
> a.inject({}) { |h,x| h[x] = yield(x) }

Same here:

a.inject({}) { |h,x| h[x] = yield(x);h }

> end
> end
> hash = a.to_h { |x| x*2}
> 
> I think the inject method most clearly shows what's going on.

Kind regards

    robert