Calling the [] method on Hash converts a one-dimensional array with an even number of elements into a hash, with odd/even elements alternating as keys/values. Very cool 🙂
$ irb
2.2.0 :001 > Hash['key1', 'value1', 'key2', 5]
=> {"key1"=>"value1", "key2"=>5}
2.2.0 :002 > Hash['key1', 'value1', 'key2']
ArgumentError: odd number of arguments for Hash
Advertisements
