CODEWITHSUNDEEP
rubyhash
Jeet Sharma
Jeet Sharma

Reputation: 69

Ruby: Match keys in a hash to return respective key+value

I have hash which is

hash = {"stars"=>"in the galaxy", "fin"=>"is for fish", "fish"=>"has fins"}

Now I have a find method

def find(value)
    if hash.empty? == true
      return {}
    else
     return  hash
    end
  end

Now i want to do is- when executed find("fi") , I want the method to return all the hash key+ value which contain fi in the key. So an output such that would look like -

{"fin"=>"is for fish", "fish"=>"has fins"}

Please note "fi" is not fixed. It can be anything. Since Find method accepts an argument value.

Any help or suggestion is appreciate. I tried hash#select. but wasnt so helpful. I am not really sure what to use here.

Upvotes: 2

Views: 8856

Answers (2)

the Tin Man
the Tin Man

Reputation: 160551

I'd use something like:

hash = {"stars"=>"in the galaxy", "fin"=>"is for fish", "fish"=>"has fins"}
pattern = 'fi'
hash.select{ |k,v| k[pattern] }
# => {"fin"=>"is for fish", "fish"=>"has fins"}

Upvotes: 6

rohit89
rohit89

Reputation: 5773

hash.select {|k, _| k.include? str} where str is the string you're looking for.

Upvotes: 8

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