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Created November 18, 2021 22:41
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gistfile1.txt
https://github.com/ruby/ruby/blob/master/enumerator.c#L3454 (rb_arithmetic_sequence_beg_len_step)
https://github.com/ruby/ruby/blob/master/enumerator.c#L3429 (rb_arithmetic_sequence_extract)
p [0,1,2,3,4][(3..).step(-2)] #=> {begin = 8, end = 7, step = 18446744073709551615, exclude_end = 0}
p [0,1,2,3,4,5][(2..).step(-3)] #=> {begin = 8, end = 7, step = 18446744073709551615, exclude_end = 0}
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