• lucky
  • First Class
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  • Registered: 2007-09-28
  • Posts: 227

Topic: eliminate duplicate key based on value

HI friends ,

i have hash as below

list = {"18" => 1,"15" => 2,"15" => 3,"17" => 4,"18" => 5}
above hash there 2 duplicatekeys with values 2,3.I want to keep only one key=> value based on value i prefered
here  i want to get result as below if i select value  3
{"18" => 1,"15" => 3,"17" => 4,"18" => 5}

If i select value 2 i want result as   {"18" => 1,"15" => 2,"17" => 4,"18" => 5}
Can anybody help me

  • Registered: 2011-06-25
  • Posts: 8

Re: eliminate duplicate key based on value

You can't get a hash with duplicate keys. If you create literal as you mentioned in your post, the last key-value pair override the first one. You can check it:

list.each { |k, v| puts "#{k}: #{v}" }
  • lucky
  • First Class
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  • Registered: 2007-09-28
  • Posts: 227

Re: eliminate duplicate key based on value

If i created hash likethat how to get result which i want