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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 (2025-08-15 12:02:22 GIT hash 301b5b75e77076d091b38f555473f9f0e31e5b5c built by fridi@fzen)