> the realm of insight

Definitely helped understand in place quicksort and need to swap pivot value.

For those still confused remember the invariants

Start with:[????????????p?????], end with:[|<=p|p|>p|]

Partition via:[p|<=p|???|>p] (pivot|less than or equal to pivot|untested values|greater than pivot).

Giving: [|p|<=p|>p|]

pivot|less than or equal pivot|greater than. This requires swapping pivot at end of partition step