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scan1

Sequence.scan1

scan1 works like its counterpart with an initial value, except
that the initial value is taken to be the first element of the given
Sequence.

for example, (1::id).scan (+) would create [1, 2, 3, 4, ...], while
(1..).scan (+) would create [1, 3, 6, 10, ...].
0.095dev (2025-09-09 14:29:31 GIT hash 98644f8f651c2101a0730cfe31c5807993b7603b built by fridi@fzen)