Ruby | Hash delete() function

Ruby | Hash delete_if() function

Last Updated : 07 Jan, 2020

delete_if() is a Hash class method which delete_if the key-value pair if the block condition is true

Syntax: Hash.delete_if() Parameter: Hash array Block Condition Return: value from hash whose key is equal to delete_ifd key.

Example #1:

Ruby

# Ruby code for delete_if() method


# declaring Hash value
a = { "a" => 100, "b" => 200 }

# declaring Hash value
b = {"a" => 100, "c"=>30}


puts "delete_if   a : #{a.delete_if{|key, value| value > 200 } }\n\n"

puts "delete_if   b : #{b.delete_if{|key, value| key == "a" } }\n\n"

Output :

delete_if   a : {"a"=>100, "b"=>200}

delete_if   b : {"c"=>30}

Example #2:

Ruby

# Ruby code for delete_if() method


# declaring Hash value
c = {"a" => 100, "c" => 300, "b" => 200}

puts "delete   b : #{c.delete_if{|key, value| key <= "b" } }\n\n"

Output :

delete   b : {"c"=>300}

Ruby | Hash delete() function

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