On Thu, Feb 5, 2015 at 7:02 AM, Graham Samuel <livf...@mac.com> wrote:
> Thanks Jacque, a gold mine of information as usual. But it’s pretty > obscure, isn’t it? All this started for me because I wanted to test if two > numbers were equal, knowing that they probably weren’t exactly equal to the > last decimal place but nevertheless were ‘engineering equal’ as it were - > say to six places of decimals. So I tried to truncate them to that length > and then compare them. More fool me. But now I think I know what should be > done, thanks to you - and to everyone else who replied. > > Graham > Why not a simple: (in the multline msg box) put "1.99999999901" into a put "1.99999999902" into b put a = b into msg put cr & (char 1 to 8 of a = char 1 to 8 of b) after msg put "1.0" into a put "1.0000000001" into b put cr & (a = b) after msg put cr & (char 1 to 8 of a = char 1 to 8 of b) after msg 8 characters is to 6 decimal places and the fact that LC automatically casts to numbers where it can nicely solves the problem that although string 1.0 <> 1.000000 in your case you are interested in the numeric value so you get the correct answer. LCs chunking capabilities are brilliant, we sometimes just need to remember that a number is a word in LC, and words have characters, and characters can be compared. The nice thing about LC is when presented with a number Cat you don't have to skin it with only number solutions; you can engineer any result you want ;-) _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
