10 lines
295 B
Factor
10 lines
295 B
Factor
USING: kernel math.parser math.ranges prettyprint regexp
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sequences sequences.extras splitting ;
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: expand ( str -- seq )
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"," split [
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R/ (?<=\d)-/ re-split [ string>number ] map
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dup length 2 = [ first2 [a,b] ] when
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] map-concat ;
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"-6,-3--1,3-5,7-11,14,15,17-20" expand .
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