Thanks Ken. Like you, I do tend to put parens around individual conditions in a multi-condition if statement. I guess as long as all the conditions are in parens, it won;t matter if parens change the order of evaluation.
Thanks to all for the clarifications. Pete Molly's Revenge <http://www.mollysrevenge.com> On Thu, Oct 6, 2011 at 10:14 AM, Ken Ray <k...@sonsothunder.com> wrote: > > On Oct 6, 2011, at 11:40 AM, Pete wrote: > > > Thanks Alex, makes total sense with the examples you provided. > > > > The only remaining question in my mind is if the use of parens changes > > anything - a post yesterday suggested that putting a condition in parens > > causes it to be evaluated ahead of the other conditions but I can't make > > that happen in your example. I suspect confusion between precedence and > > evaluation again. > > There are certain times where parens are necessary (I just wish I could > remember specifically where and when). It *is* a good practice to put > expressions in parens for readability, especially when it comes to working > with objects. Compare: > > if the name of button 1 contains "test" and the name of button 2 contains > "test" then > > if (the name of button 1 contains "test") and (the name of button 2 > contains "test") then > > The second is definitely more readable. Personally, I put parens around > most/all expressions since that is the way it is with most other languages. > For example, we *can* do this: > > if 2 + 3 = 5 then > answer "Right" > else > answer "Wrong" > end if > > but if you try that the equivalent in JavaScript: > > if 2 + 3 == 5 { > alert("Right"); > } else { > alert("Wrong"); > } > > you won't get an alert dialog. You have to put the expression in parens to > make it work: > > if (2 + 3 == 5) { > alert("Right"); > } else { > alert("Wrong"); > } > > So my suggestion is to parenthesize everything for both readability and > developing a cross-compatible coding style, even if it doesn't affect (for > LiveCode) how the engine parses the expression. > > > Ken Ray > Sons of Thunder Software, Inc. > Email: k...@sonsothunder.com > Web Site: http://www.sonsothunder.com/ > > _______________________________________________ > 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 > > _______________________________________________ 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
