Bug #5411 » 0001-change-Enumerable-group_by-description.patch
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* enum.group_by -> an_enumerator
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*
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* Groups the collection by result of the block. Returns a hash where the
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* keys are the evaluated result from the block and values the values are
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* arrays of elements in the collection that corresponding to the key.
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* keys are the evaluated result from the block and the values are
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* arrays of elements in the collection that correspond to the key.
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*
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* If no block is given an enumerator is returned.
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*
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* (1..6).group_by {|i| i%3} #=> {0=>[3, 6], 1=>[1, 4], 2=>[2, 5]}
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* (1..6).group_by { |i| i%3 } #=> {0=>[3, 6], 1=>[1, 4], 2=>[2, 5]}
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*
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*/
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