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21 lines
409 B
Ruby
21 lines
409 B
Ruby
require 'rubygems'
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require 'test-unit'
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require 'uri'
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require 'http/cookie'
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module Enumerable
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def combine
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masks = inject([[], 1]){|(ar, m), e| [ar << m, m << 1 ] }[0]
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all = masks.inject(0){ |al, m| al|m }
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result = []
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for i in 1..all do
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tmp = []
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each_with_index do |e, idx|
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tmp << e unless (masks[idx] & i) == 0
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end
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result << tmp
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end
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result
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end
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end
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