17 lines
301 B
Text
17 lines
301 B
Text
func combine(n, set) {
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set.len || return []
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n == 1 && return set.map{[_]}
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var (head, result)
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head = set.shift
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result = combine(n-1, [set...])
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for subarray in result {
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subarray.prepend(head)
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}
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result + combine(n, set)
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}
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combine(3, @^5).each {|c| say c }
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