Thanks - I don’t completely understand this as an economical solution, but I think what you’re saying is that any number, even stored in a variable, can be treated as a string - then things can be compared character by character. This is almost the solution I adopted, but I used fields since they stay as strings from the off.
Graham > On 7 Feb 2015, at 02:38, Kay C Lan <[email protected]> wrote: > > On Thu, Feb 5, 2015 at 7:02 AM, Graham Samuel <[email protected]> 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 > [email protected] > Please visit this url to subscribe, unsubscribe and manage your subscription > preferences: > http://lists.runrev.com/mailman/listinfo/use-livecode _______________________________________________ use-livecode mailing list [email protected] Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
