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hannestyden/hash.rb

Created October 10, 2014 11:10
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hash.rb
class Hash
alias_method :[], :fetch # !> method redefined; discarding old []
end
h = {a: 1}
h[:a] # => 1
h[:b] rescue $! # => #<KeyError: key not found: :b>
h[:b, 2] # => 2
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