How to add values in global Hash from method? RoR

Question

I have some problem. I have many strings with keys and their belongings, keys are always the same. String looks like "key1=value1;key2=value2..." . So I made global Hash with arrays as values and want to store all data from strings into that hash so I made function:

<%
$all={}
for len in (0..$authors.length-1)
   $all[$authors[len]] = Array.new   #authors are defined and filled earlier
end

def add_hash(from)
   the_from = from.to_s.split(";")
   for one in the_from
      splitted = one.split("=")
      for j in (0..$authors.length.to_i-1)
         if($authors[j] == splitted[0])
            $all[$authors[j]] << splitted[1]
         end
      end
   end
end
%>

but it doesn't seem to work, is something wrong in my code? (note: I can only use Ruby on Rails code)

Define "doesn't work". You never actually call add_hash, if you were expecting it to do something. Not sure what the point of the initial hash init is, you can set a default hash value in the Hash constructor. Not sure why this is in what appears to be an ERB template, either. — Dave Newton
Yes, the question is badly put. Can you give an example of the expected input and output of all variables? I don't understand what $authors is made of. Also, be aware that variables are not named with $ sign in ruby. You can also use array.each_with_index { |value, index| #your code }. — Wawa Loo

Yuri Barbashov Yuri Barbashov · Accepted Answer · 2012-06-19T11:28:17

Just for lolz)), cause of

note: I can only use Ruby on Rails code

place it in lolo.rb in initializer folder of rails app

require 'singleton'

class Lolo < Hash
  include Singleton

  def initialize
    super([])
  end

  def add src
    src.to_s.split(";").each do |item|
      splitted = item.split("=")
      self[splitted[0]] = splitted[1]
    end
  end
end

in any place call all =Lolo.instance to access hash, and all.add("key1=value1;key2=value2") to add elements, all.keys is authors list

and don't use global vars cause it could cause a lot of problem

How to add values in global Hash from method? RoR

2 Answers