From: Paul Battley <pbattley@...>
Date: 2006-03-17T01:26:43+09:00
Subject: Re: Building querystrings with ruby

On 16/03/06, ebeard <ecbearden@gmail.com> wrote:
> Wow, I have no idea what this does or how it works.  Would you mind
> taking this apart and describing how it works?

  "?"<<map{|h|h.map{|e|CGI.escape(e)}*'='}*'&'

This can be spaced out a bit:

  "?" <<              # append what follows to the string '?'
  map { |h|           # h looks like ['key', 'value'] for each key-value pair
    h.map { |e|       # e looks like 'key' or 'value'
      CGI.escape(e)   # escape each element
    } * '='           # join key and value with '='
  } * '&'             # join each key-value pair with '&'

Is that any clearer?

Paul.