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ternary operation http://forums.clankiller.com/viewtopic.php?f=24&t=2198 |
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Author: | Satis [ Thu Feb 08, 2007 10:33 am ] |
Post subject: | ternary operation |
ok...this is cool but confused me for awhile. I get it now and it's not hard, but I'm going to share the syntax and a quick explanation for anyone that needs it (probably not gfree or pig, but I can use it as a reference and anyone that nubier than me may get something out of it. Basically a ternary operation is shorthand for an if-then-else statement. php: [php] if($var == true){ $var = false; } else{ $var = true; } [/php] that's a standard and very simple if/then/else statement in php. Any c-like language has something similar. the ternary equivalent is [php] $var = ($var == true) ? false : true; [/php] much, much, much easier to write, and once you're used to it, much easier to read a series of conditionals. Anyway, as a quick description $var_to_set = (conditional statement) ? value_to_set_var_to_if_true : value_to_set_var_to_if_false; easy enough, right? here's a wikipedia entry on the subject http://en.wikipedia.org/wiki/Ternary_operation |
Author: | Pig [ Thu Feb 08, 2007 1:57 pm ] |
Post subject: | |
I love ternaries. Once you get used to them, you use them constantly. It's so much easier and significantly less code. |
Author: | RB [ Thu Feb 08, 2007 5:13 pm ] |
Post subject: | Re: ternary operation |
I'm little off the context... sample: [php] $var = ($var == true) ? false : true; [/php] replacement: [php] $var = !$var; [/php] |
Author: | Satis [ Fri Feb 09, 2007 7:36 am ] |
Post subject: | |
heh, indeed. I was only trying to be simple. How about something a little more down to earth? javascript: [php]function imageEdit(){ var thespan = document.getElementById("imageUpload"); thespan.style.display = (thespan.style.display != 'none') ? 'none' : 'inline'; }[/php] |
Author: | Pig [ Fri Feb 09, 2007 12:00 pm ] |
Post subject: | |
I use it a lot for overiding defaults. [php] $limit = ($_GET['limit']) ? $_GET['limit'] : PAGINATION_LIMIT; [/php] |
Author: | RB [ Fri Feb 09, 2007 12:31 pm ] | |||||||||
Post subject: | ||||||||||
(Since Sat posted JS...) Oh, but they are widely used in OCC too.
Note the row of "?"-s. They belong to the ternary operators. |
Author: | Satis [ Sat Feb 10, 2007 10:47 am ] |
Post subject: | |
that, sir, is gobbledy-gook masquerading as code. I actually looked over the shoulder of one of our programmers yesterday... he was trying to debug some code. It was all in c++ and it looked something like that, with comments dead center in the code block. As much as I know, sometimes I feel like I know not a goddamned thing. |
Author: | RB [ Sat Feb 10, 2007 11:16 am ] |
Post subject: | |
Offtopic: why certain number of you keeps addressing me as "sir"? Should I change my nick? |
Author: | Satis [ Sun Feb 11, 2007 1:39 am ] |
Post subject: | |
nah, just a form of speech. Changing your nick won't matter. A gfree by any other name is just as odd. |
Author: | RB [ Sun Feb 11, 2007 5:36 am ] |
Post subject: | |
However, I dislike that 'sir'. Sounds kinda - distancing? |
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