Hash#empty?() is a Hash class method which checks whether the Hash array has any key-value pair.
Syntax: Hash.empty?()
Parameter: Hash values
Return: true – if no key value pair otherwise return false
Example #1 :
Ruby
a = {a: 100 , b: 200 }
b = {a: 100 , c: 300 , b: 200 }
c = {a: 100 }
puts "Hash a empty? form : #{a.empty?()}\n\n"
puts "Hash b empty? form : #{b.empty?()}\n\n"
puts "Hash c empty? form : #{c.empty?()}\n\n"
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Output :
Hash a empty? form : false
Hash b empty? form : false
Hash c empty? form : false
Example #2 :
Ruby
a = { "a" => 100 , "b" => 200 }
b = {}
c = { "a" => 100 , "c" => 300 , "b" => 200 }
puts "Hash a empty? form : #{a.empty?()}\n\n"
puts "Hash b empty? form : #{b.empty?()}\n\n"
puts "Hash c empty? form : #{c.empty?()}\n\n"
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Output :
Hash a empty? form : false
Hash b empty? form : true
Hash c empty? form : false