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heftig/hash.rb

Forked from havenwood/additional_hash_methods.rb
Last active December 13, 2015 19:39
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hash.rb
class Hash
def map_value
each_pair.with_object({}) { |(key, value), result| result[key] = yield value }
end
def map_key
each_pair.with_object({}) { |(key, value), result| result[yield key] = value }
end
def map_pair(&blk)
Hash[map(&blk)]
end
end
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