There is an algorithm for finding the correct place in an indexed set by repeatedly dividing the set in half and discarding the half that does not contain the required item.
Does anyone know what this algorithm is called and who developed it?
I must have googled every other 'search' combination; never thought of binary though it's obvious when you see it. Chop never even came into the equation, if you'll pardon the pun.
Got just what I needed from Wiki'ing 'binary search'; thanks again.