Feature #10726 ยป implement_set#power.patch
| lib/set.rb | ||
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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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# 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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