Iterators
slidingO
The circular equivalent of sliding.
Example
Seq(0, 1, 2).slidingO(2) // Iterator(Seq(0, 1), Seq(1, 2), Seq(2, 0))```
Compared to standard
In the same example the standard version behaves differently, does not pass the “sliding window” on the last and first elements.
Seq(0, 1, 2).sliding(2) // Iterator(Seq(0, 1), Seq(1, 2))```
rotations
All possible rotations.
Note
Starting from itself and moving one rotation step to the left.
Example
Seq(0, 1, 2).rotations // Iterator(Seq(0, 1, 2), Seq(1, 2, 0), Seq(2, 0, 1))
On empty seq
Just itself on empty Seq.
Seq.empty.rotations // Iterator(Seq())
reversions
2 sequences, the sequence itself and reversed.
Example
Seq(0, 1, 2).reversions // Iterator(Seq(0, 1, 2), Seq(2, 1, 0))
On empty seq
Just itself on empty Seq.
Seq.empty.reversions // Iterator(Seq())
reflections
2 sequences, the sequence itself and reflected at the start.
Example
Seq(0, 1, 2).reflections // Iterator(Seq(0, 1, 2), Seq(0, 2, 1))
On empty seq
Just itself on empty Seq.
Seq.empty.reflections // Iterator(Seq())
rotationsAndReflections
All possible rotations and reflections.
Note
Starting from itself and moving one rotation step to the right, then reversing and doing the same.
Example
Seq(0, 1, 2).rotationsAndReflections // Iterator(Seq(0, 1, 2), Seq(1, 2, 0), Seq(2, 0, 1), Seq(0, 2, 1), Seq(2, 1, 0), Seq(1, 0, 2))
On empty seq
Just itself on empty Seq.
Seq.empty.rotationsAndReflections // Iterator(Seq())
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