Class: Hash (Ruby 1.9.3)

Creates a new hash populated with the given objects. Equivalent to the literal { key => value, ... }. In the first form, keys and values occur in pairs, so there must be an even number of arguments. The second and third form take a single argument which is either an array of key-value pairs or an object convertible to a hash. Hash["a", 100, "b", 200] #=> {"a"=>100, "b"=>200} Hash[ [ ["a", 100], ["

[willnet]

Hash#updateはHash#merge!と同じ／block渡すと、keyがかぶったときにどちらを残すか指定できる／block渡さないと、引数にした方が優先