Ruby | Hash compact!() function
compact! () is a Hash class method which returns the Hash after removing all the ‘nil’ value elements (if any) from the Hash. If there are no nil values in the Hash it returns back the nil value.
Syntax: Hash.compact!()
Parameter: Hash to remove the ‘nil’ value from.
Return: removes all the nil values from the Hash.
nil – if there is no nil value in the Hash
Example #1 :
a = {a: 100 , b :nil }
b = {a: 100 , c :nil , b: 200 }
c = {a: 100 }
puts "removing nil value : #{a.compact!}\n\n"
puts "removing nil value : #{b.compact!}\n\n"
puts "removing nil value : #{c.compact!}\n\n"
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Output :
removing nil value : {a:100}
removing nil value : {a:100, b:200}
removing nil value : {}
Example #2:
a = { "a" => nil , "b" => 200 }
b = { "a" => 100 }
c = { "a" => 100 , "c" => nil , "b" => 200 }
puts "removing nil value : #{a.compact!}\n\n"
puts "removing nil value : #{b.compact!}\n\n"
puts "removing nil value : #{c.compact!}\n\n"
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Output :
removing nil value : {b:200}
removing nil value :
removing nil value : {a:100, b:200}
Last Updated :
07 Jan, 2020
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