Ruby: Easiest Way to Filter Hash Keys?

Question

I have a hash that looks something like this:

params = { :irrelevant => \"A String\",
           :choice1 => \"Oh look, another one\",
           :choi         


        

Answer 1

As for bonus question:

1. If you have output from #select method like this (list of 2-element arrays):

   [[:choice1, "Oh look, another one"], [:choice2, "Even more strings"], [:choice3, "But wait"]]
   

   then simply take this result and execute:

   filtered_params.join("\t")
   # or if you want only values instead of pairs key-value
   filtered_params.map(&:last).join("\t")
   

2. If you have output from #delete_if method like this (hash):

   {:choice1=>"Oh look, another one", :choice2=>"Even more strings", :choice3=>"But wait"}
   

   then:

   filtered_params.to_a.join("\t")
   # or
   filtered_params.values.join("\t")