CODEWITHSUNDEEP
rubyhash
user2675010
user2675010

Reputation:

Ruby: Delete all key value pair in hash with a particular value

My hash: 

hash={value1: "2",value2: "1",value3: "6",value4: "2" }

What I want is to remove all key value pairs with value of "2" like this: 

hash={value2: "1",value3: "6"}

How to do that?

Upvotes: 11

Views: 4239

Answers (1)

Arup Rakshit
Arup Rakshit

Reputation: 118261

How is this using delete_if ?

hash={value1: "2",value2: "1",value3: "6",value4: "2" } 
hash.delete_if{|_,v| v == "2"}
# => {:value2=>"1", :value3=>"6"}
hash
# => {:value2=>"1", :value3=>"6"}

If you don't want to modify the original hash then you could use also Hash#reject :

hash={value1: "2",value2: "1",value3: "6",value4: "2" } 
new_hash=hash.reject{|_,v| v == "2"}
# => {:value2=>"1", :value3=>"6"}
hash # => {:value1=>"2", :value2=>"1", :value3=>"6", :value4=>"2"}

Upvotes: 14

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