global-variables

问题 I have to turn back to (embedded) C after some lengthy time with C++, and have the following problem: I have a source module which is included a lot of times, let's call it utilities.h and utilities.c In it, I have an important array, let's call it #define IMPORTANT_ARRAY_LENGTH 10000 char important_array[IMPORTANT_ARRAY_LENGTH]; I have a lot of other functions in this utilities module, and they all work fine. However, in one of the other source files, let's call it worker.c , I have to use

问题 I'm using CodeIgniter and I have user data that needs to be stored in some way then updated. Basic things like name, id, points, comment count etc At the moment when the user logs in I simply get their data and store it in a session. Now obviously the name and id would never change, but the Points and Comment count etc will change from page to page depending on the user actions. As this data will be constantly changing, what would be the best way to store it , update it and make it available

问题 This question already has answers here : How do I pass variables and data from PHP to JavaScript? (20 answers) Closed 5 years ago . I have a page where I want to display some points on map. I have small templates (like Smarty, but lighter) and there in template I have variable $points, that consists of coordinates of points I need. I need to pass them to javascript (because only javascript can render that map with points). I have 3 variants of doing it. Can you tell, what is best? 1th way:

问题 I have a simple Email() class. It's used to send out emails from my website. <? Email::send($to, $subj, $msg, $options); ?> I also have a bunch of email templates written in plain HTML pierced with a few PHP variables. E.g. /inc/email/templates/account_created.php : <p>Dear <?=$name?>,</p> <p>Thank you for creating an account at <?=$SITE_NAME?>. To login use the link below:</p> <p><a href="https://<?=$SITE_URL?>/account" target="_blank"><?=$SITE_NAME?>/account</a></p> In order to have the PHP

问题 I am learning Python. A book on Python 3 says the following code should work fine: def funky(): print(myvar) myvar = 20 print(myvar) myvar = 10 funky() But when I run it in Python 3.3, I got the UnboundLocalError: local variable 'myvar' referenced before assignment error. My understanding is that the first print(myvar) in funky should be 10 since it's a global variable. The second print(myvar) should be 20 since a local myvar is defined to be 20. What is going on here? Please help clarify.

问题 I developed a PHP page with global variable like this; global $amty_imgCache; $amty_imgCache = array(); $GLOBALS["amty_imgCache"]=$amty_imgCache; This page has functions to add/delete entries to/from this array. I called a function on antother PHP page to display its count and to put some elements into this global array this way; Count <?php echo amty_getImageCacheCount(); ?> <?php amty_putIntoImageCache(100,0); ?> Count <?php echo amty_getImageCacheCount(); ?> But on every refresh first it

问题 Coming from much less dynamic C++, I have some trouble understanding the behaviour of this Python (2.7) code. Note: I am aware that this is bad programming style / evil, but I would like to understand it non the less. vals = [1,2,3] def f(): vals[0] = 5 print 'inside', vals print 'outside', vals f() print 'outside', vals This code runs without error, and f manipulates the (seemingly) global list. This is contrary to my prior understanding that global variables that are to be manipulated (and

问题 Coming from much less dynamic C++, I have some trouble understanding the behaviour of this Python (2.7) code. Note: I am aware that this is bad programming style / evil, but I would like to understand it non the less. vals = [1,2,3] def f(): vals[0] = 5 print 'inside', vals print 'outside', vals f() print 'outside', vals This code runs without error, and f manipulates the (seemingly) global list. This is contrary to my prior understanding that global variables that are to be manipulated (and

问题 I was reading the following analysis from David Mark about the js framework "Sencha": https://gist.github.com/3279190 and in there he states... What they wanted was a global variable, but they ended up with is a property of the Global Object. According the specifications and (and implementation history) there are enough differences between the two that care is required not to mix them up (as is done here). ...but as far as I was aware there wasn't any difference between var my_global = 123;

问题 When i attended an interview, the interviewer asked me this question. Which memory they are using heap , stack etc. I googled it but i didn't get any clear answer. 回答1: The values of $_POST internally are created inside php_auto_globals_create_post() and made available via PG(http_globals)[TRACK_VARS_POST] , which is just a way to reference http_globals. The definition of aforementioned http_globals tells us that it's an array of zval * elements, one for each $_POST , $_GET , $_COOKIE , etc.