On Jul 28, 2017, at 9:06 AM, Dave Crozier DaveC@Flexipol.co.uk wrote:
Mind you Tuples really take a lot of understanding to get the most of them - and we thought that VFP collections were different!!!
When all you’ve had are arrays/lists, tuples can be odd. I think of them as a single piece of data that consists of more than one value, such as an x-y coordinate, or a GPS point of latitude, longitude, and elevation.
The thing that trips up most people is that a tuple is immutable, while a list is mutable. If you find yourself trying to modify a tuple, maybe you shouldn’t be using a tuple in the first place. The x-y value of a point never changes. If you have a different number in that tuple, it’s a different point!
-- Ed Leafe