From: Meino Christian Cramer <Meino.Cramer@...>
Date: 2006-03-31T14:54:42+09:00
Subject: Re: Most simple way to do "array + array => hash"

From: Hal Fulton <hal9000@hypermetrics.com>
Subject: Re: Most simple way to do "array + array => hash"
Date: Fri, 31 Mar 2006 14:39:58 +0900

Hi Hal,

 no, it seems not (from my irb):

 >> a=("A".."Z").to_a
 => ["A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"]
 >> b=("A".."Z").sort_by{rand}
 => ["D", "C", "X", "P", "Y", "R", "S", "W", "N", "L", "U", "A", "Z", "B", "M", "T", "O", "K", "Q", "G", "I", "F", "J", "H", "V", "E"]
 >> c=Hash[*a.zip(b)]
 => {["E", "Y"]=>["F", "R"], ["Q", "O"]=>["R", "K"], ["A", "D"]=>["B", "C"], ["W", "J"]=>["X", "H"], ["M", "Z"]=>["N", "B"], ["U", "I"]=>["V", "F"], ["C", "X"]=>["D", "P"], ["I", "N"]=>["J", "L"], ["O", "M"]=>["P", "T"], ["G", "S"]=>["H", "W"], ["Y", "V"]=>["Z", "E"], ["S", "Q"]=>["T", "G"], ["K", "U"]=>["L", "A"]}

 by the way: Is there a howto, a piece of text or a webpage or...
 which describes all these "nice little things" which are possible
 in ruby in a single line of code and which occupy the half of a page
 of cryptic code in other languages ?

 Especially ruby newbies like me often fall over such "little things" like
 converting a "A" to a 65, cause doing "A"[0] is very simple but not 
 what a long year C-coder would exspect at first hand. 

 Ruby!
 mcc

> Meino Christian Cramer wrote:
> > Hi,
> > 
> >  Is there a ruby-like way to make an hash from two equeal sized
> >  arrays, one containing the keys only and the other the values ?
> > 
> >  Thanks a lot for any help in advance !
> >  
> 
> Would this work?
> 
>    Hash[*arr1.zip(arr2)]
> 
> 
> Hal
> 
>