Ruby | Hash keep_if() function

Hash#keep_if() is a Hash class method which only keeps those key value pair that follows the block condition.

Syntax: Hash.keep_if()

Parameter: Hash values
block – condition



Return: key value pair that follows the block condition

Example #1 :

filter_none

edit
close

play_arrow

link
brightness_4
code

# Ruby code for Hash.keep_if() method
  
# declaring Hash value
a = {a:100, b:200}
  
# declaring Hash value
b = {a:100, c:300, b:200}
  
# declaring Hash value
c = {a:100}
  
  
# keep_if Value
puts "Hash a keep_if form : #{a.keep_if{|key| key != 100}}\n\n"
  
puts "Hash b keep_if form : #{b.keep_if{|key| key = 200}}\n\n"
  
puts "Hash c keep_if form : #{c.keep_if{|key| key != 200}}\n\n"

chevron_right


Output :

Hash a keep_if form : {:a=>100, :b=>200}

Hash b keep_if form : {:a=>100, :c=>300, :b=>200}

Hash c keep_if form : {:a=>100}

Example #2 :

filter_none

edit
close

play_arrow

link
brightness_4
code

# Ruby code for Hash.keep_if() method
  
# declaring Hash value
a = { "a" => 100, "b" => 200 }
  
# declaring Hash value
b = {"a" => 100}
  
# declaring Hash value
c = {"a" => 100, "c" => 300, "b" => 200}
  
# keep_if Value
puts "Hash a keep_if form : #{a.keep_if{|key| key != 100}}\n\n"
  
puts "Hash b keep_if form : #{b.keep_if{|key| key = 200}}\n\n"
  
puts "Hash c keep_if form : #{c.keep_if{|value| value != 200}}\n\n"

chevron_right


Output :

Hash a keep_if form : {"a"=>100, "b"=>200}

Hash b keep_if form : {"a"=>100}

Hash c keep_if form : {"a"=>100, "c"=>300, "b"=>200}



My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.




Article Tags :

Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.