9 lines
266 B
Text
9 lines
266 B
Text
def combination(r):
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if r > length or r < 0 then empty
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elif r == length then .
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else ( [.[0]] + (.[1:]|combination(r-1))),
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( .[1:]|combination(r))
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end;
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# select r integers from the set (0 .. n-1)
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def combinations(n;r): [range(0;n)] | combination(r);
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