Tuesday, April 13, 2004, 11:25:52 PM, you wrote:
Do you actually need such a functionality in any applications?
RS> No. The point I was making is that were I to call such a RS> function, that's the behavior I'd expect. Does not having a RS> current need for it make it less valid? I think it does. One could think of 10 other behaviours of add_month, starting from the random day of the next month, but they would be nothing but useless. And I can not imagine any real use for the add_month behaviour you have described. RS> It isn't mathematical, by which I meant predictable, without RS> accounting for whether the day of the current month is available RS> in the subsequent month. That is, yours may fall back anywhere RS> from zero to three days. Mine is certain to advance to the same RS> day of the month or exactly 30 days beyond the start; that's far RS> more predictable. Predictable? It is definitely not predictable. I think, most people expect that after d2 = add_month(add_month(d1, 1), -1) d1 and d2 are in the same month. And your definition breaks this obvious rule. Val Samko http://val.digiways.com