Hash#invert() is a Hash class method which gives the hash by reverting keys to values and values to key.
Syntax: Hash.invert()
Parameter: Hash values
Return: hash by reverting keys to values and values to key
Example #1 :
a = {a:100, b:200}
b = {a:100, c:300, b:200}
c = {a:100}
puts "Hash a invert form : #{a.invert()}\n\n"
puts "Hash b invert form : #{b.invert()}\n\n"
puts "Hash c invert form : #{c.invert()}\n\n"
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Output :
Hash a invert form : {100=>:a, 200=>:b}
Hash b invert form : {100=>:a, 300=>:c, 200=>:b}
Hash c invert form : {100=>:a}
Example #2 :
a = { "a" => 100, "b" => 200 }
b = {"a" => 100}
c = {"a" => 100, "c" => 300, "b" => 200}
puts "Hash a invert form : #{a.invert()}\n\n"
puts "Hash b invert form : #{b.invert()}\n\n"
puts "Hash c invert form : #{c.invert()}\n\n"
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Output :
Hash a invert form : {100=>"a", 200=>"b"}
Hash b invert form : {100=>"a"}
Hash c invert form : {100=>"a", 300=>"c", 200=>"b"}
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