28 lines
730 B
Text
28 lines
730 B
Text
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F range_extract(lst)
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[[Int]] r
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V lenlst = lst.len
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V i = 0
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L i < lenlst
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V low = lst[i]
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L i < lenlst - 1 & lst[i] + 1 == lst[i + 1]
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i++
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V hi = lst[i]
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I hi - low >= 2
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r [+]= [low, hi]
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E I hi - low == 1
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r [+]= [low]
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r [+]= [hi]
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E
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r [+]= [low]
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i++
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R r
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F printr(ranges)
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print(ranges.map(r -> (I r.len == 2 {r[0]‘-’r[1]} E String(r[0]))).join(‘,’))
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L(lst) [[-8, -7, -6, -3, -2, -1, 0, 1, 3, 4, 5, 7,
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8, 9, 10, 11, 14, 15, 17, 18, 19, 20],
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[0, 1, 2, 4, 6, 7, 8, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22,
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23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39]]
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printr(range_extract(lst))
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