8 lines
252 B
Text
8 lines
252 B
Text
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# combination(r) generates a stream of combinations of r items from the input array.
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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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