From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2011-02-15T19:05:48+09:00
Subject: Re: Hash sanitization from query - newbie

On Tue, Feb 15, 2011 at 10:51 AM, Sem Ptiri <rubyforum@chthonic.co.za> wrote:
> If I have the following:
>
> [[148,"Uneducated"],[135,"Highschool"],[272,"Some
> college"],[141,"University"],[143,"Post-grad"],[144,"PhD"],[141,"other"],[8,"Post-doc"]]
>
> is there an function to invert/swap the numbers with strings?

Take a look at map or map! (if you want to modify the object in place):

irb(main):005:0> a = [[148,"Uneducated"],[135,"Highschool"],[272,"Some
college"],[141,"University"],[143,"Post-grad"],[144,"PhD"],[141,"other"],[8,"Post-doc"]]
=> [[148, "Uneducated"], [135, "Highschool"], [272, "Some college"],
[141, "University"], [143, "Post-grad"], [144, "PhD"], [141, "other"],
[8, "Post-doc"]]
irb(main):006:0> a.map {|(num,string)| [string,num]}
=> [["Uneducated", 148], ["Highschool", 135], ["Some college", 272],
["University", 141], ["Post-grad", 143], ["PhD", 144], ["other", 141],
["Post-doc", 8]]

Jesus.