Do while

library operator
ID: d12fa993-be44-4de9-815e-190bc1c1455d
Performs a task repetetively, at least once..
performs a task repetetively, at least once, using an iterator delegate

Implementation

The implementation of Do while makes use of the following 3 operators.

1
Lets an iterator delegate process a state until the controller tells it to stop.
1
Emits a constant value for each item.
1
Emits items of a stream to either outgoing stream depending on the control value.