Feature #10726 » implement_set#power.patch
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end
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end
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# Returns set of all subsets of +self+.
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#
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# e.g.:
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#
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# require 'set'
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# set = Set[1, 2].power
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# p set # => #<Set: {#<Set: {}>,
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# # #<Set: {1}>,
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# # #<Set: {2}>,
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# # #<Set: {1, 2}>}>
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def power
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(0 .. 2 ** length - 1).map { |n|
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select.with_index { |_, i| (n >> i) & 1 == 1 }.to_set
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}.to_set
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end
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InspectKey = :__inspect_key__ # :nodoc:
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# Returns a string containing a human-readable representation of the
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-
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