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simonoff/gist:4564560

Forked from xslim/hash.rb
Last active December 11, 2015 07:09
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gistfile1.rb
class Hash
def select_and_sort_by(whitelist)
whitelist.inject({}) do |m,k|
k = k.to_sym
m[k] = self[k] if self.has_key?(k)
m
end
end
end
# collection.select_and_sort_by({:key1, :key3})
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