From: Jano Svitok <jan.svitok@...>
Date: 2008-05-14T23:05:02+09:00
Subject: Re: how to do the equivalent of PHP's "$_GET" in Ruby?

On Wed, May 14, 2008 at 3:39 PM, John Zorko <jmzorko@mac.com> wrote:
>
> Matthew,
>
> Indeed, this is a Rails question ... i'm new to this :-)
>
> My next question is -- what is the structure of the params hash i.e. how do
> I access it's name / value pairs without knowing in advance what the name
> will be?  To use your example:
>
> GET /controller/action/1?question_id=forsure
>
> I want to do something like this:
>
> params.each { | param | do
>        url << param[ :name ] << "=" << param[ :value ] << "&"
> end
>
> ... but I don't know how to refer to the name / value (I used :name and
> :value here to get the point across).
>
> Regards,
>
> John

1. Please bottom post (i.e. write your reply under the previous one).
It's easier to read.

2. For rails related questions,
http://groups.google.com/group/rubyonrails-talk is more suitable
- you'll get better/more specific answers there.

Nonetheless, this is a nice ruby question, so here you go:

params.each do | key, value|
       url << key << "=" << value << "&"
end

Notes: 1. it's either do...end or {...}, 2. each for Hash takes
two-parameter block

see http://ruby-doc.org/core/, class Hash. you'll find there a lot of
nice and useful stuff.

For this particular case, Enumerable#map and Array#join are handy:

url = params.map {|key, value| "#{key}=#{value}" }.join('&')

This way you won't have the trailing &.

J.