Question : Merging two arrays in Ruby

Hi experts,

in Ruby, I have two arrays:

products = Array.new
products << ["Amazon",121212,"Harry Potter"]
products << ["Amazon",242424,"John Grisham"]
products << ["Amazon",353535,"Michael Crichton"]

links = Array.new
links << [121212,"www.amazon.com/abc"]
links << [242424,"www.amazon.com/johngrisham"]
links << [353535,"www.amazon.com/somelink"]

I would like to merge these two arrays. The article number is to be the identifier.

Thus, I would like an array like this as the result:
["Amazon",121212,"Harry Potter","www.amazon.com/abc"]

Any help greatly appreciated.

Cheers, Chris

Answer : Merging two arrays in Ruby

Heres a one liner: calls collect over products and then selects the matching item in links, adding the url to the item from products and creating a new array.  You can use collect! to change the products array instead of creating a new array.

new_arr = products.collect {|item| item << ((links.select {|i| i[0]==item[1]}).first[1]) }