Change Hash to array of arrays in ruby

Question

Let's say i have a hash

 {:facebook=>0.0, :twitter=>10.0, :linkedin=>6.0, :youtube=>8.0}

Now i want it to change to an array like

[[Facebook,0.0],[Twitter,10.0],[Linkedin,6.0],[Youtube,8.0]]

I can use a logic to extract and change it in to array, but i was just wondering if there could be any defined methods in ruby which i can use to implement the above.

Answer 1

You can use to_a.

{:facebook=>0.0, :twitter=>10.0, :linkedin=>6.0, :youtube=>8.0}.to_a

returns

[[:facebook, 0.0], [:twitter, 10.0], [:linkedin, 6.0], [:youtube, 8.0]] 

This won't automatically convert your symbols to constants though, you will have to use map (and const_get) for that.

{:facebook=>0.0, :twitter=>10.0, :linkedin=>6.0, :youtube=>8.0}.map{|k,v| [Kernel.const_get(k.to_s.capitalize), v]}

Outputs

[[Facebook,0.0],[Twitter,10.0],[Linkedin,6.0],[Youtube,8.0]]

Answer 2

your_hash.to_a

is the answer. http://www.ruby-doc.org/core-1.9.2/Enumerable.html#method-i-to_a