From: Devin Mullins <twifkak@...>
Date: 2005-10-13T13:21:45+09:00
Subject: Re: array1 + array2 newb question

AHH! Nevermind. I can't read.

a1=[1,2,3]
a2=%w{a b c}
a2.map {|o2| a1.map {|o1| [o1,o2]}}

Devin

Devin Mullins wrote:

>> I'm trying to create a map grid from arrayed names of streets.  I  
>> want to go from [1,2,3] and [a,b,c] to [[1,a], [2,a], [3,a],  
>> [1,b],... [3,c]].
>
>
>
> Given:
>
> a1=[1,2,3]
> a2=%w{a b c}
>
> The brute force way:
>
> a = []; a1.length.times {|i| a << [a1[i],a2[i]]}
>
> The Ruby Way:
>
> a = a1.zip a2
>
> Plenty of other ways, too, using inject, Enumerator, etc. I'm sure 
> they'll all be contributed in a few minutes.
>
> collect! is a whole 'nother beast -- it can be munged to do the task 
> at hand,* but isn't quite appropriate, since it doesn't tell the block 
> what index you're currently at. Have you read the ri documentation on it?
>
> Devin
>
> *i = -1; a1.collect! { i+=1; [a1[i],a2[i]] }
>
>
>