double-underscore

I've edited the code from the tutorial for the index view to look like this: class IndexView(generic.ListView): template_name = 'polls/index.html' context_object_name = 'latest_poll_list' def get_queryset(self): """ Return the last five published polls (not including those set to be published in the future, or those without choices). """ return Poll.objects.filter( pub_date__lte=timezone.now(), choice__choice_text__isnull=False ).order_by('-pub_date')[:5] But now my index looks like this: What're you up to? What're you up to? What're you up to? Whats up? Whats up? How has this happened? And

Sometimes I see variable names with double underscore in the beginning and the end. For example: Article.__elasticsearch__ Is there some naming convention related to double underscores in Ruby variable names? An initial underscore or double underscore basically indicates "special/avoid overwrite" --meaning it's meant to reduce the likelihood that someone else might define a method/attribute of the same name. The most common occurrence is __send__ . From Ruby Forum The author of the ElasticSearch gem made the wrong call IMO. At the end of the thread, Avdi Grimm, who is well-known in the Ruby

In the C / Unix environment I work in, I see some developers using __progname instead of argv[0] for usage messages. Is there some advantage to this? What's the difference between __progname and argv[0] . Is it portable? __progname isn't standard and therefore not portable, prefer argv[0] . I suppose __progname could lookup a string resource to get the name which isn't dependent on the filename you ran it as. But argv[0] will give you the name they actually ran it as which I would find more useful. Using __progname allows you to alter the contents of the argv[] array while still maintaining

The single underscore in Objective-C is apparently reserved for Apple's "internal" use (and was available for use with private instance variables prior to Apple's claim). But why would they use a double -underscore in their SQLiteBooks example for the iPhone? See this snippet taken from MasterViewController.m: + (EditingViewController *)editingViewController { // Instantiate the editing view controller if necessary. if (__editingViewController == nil) { __editingViewController = [[EditingViewController alloc] initWithNibName:@"EditingView" bundle:nil]; } return __editingViewController; } There

What does the double underscores in these lines of PHP code mean? $WPLD_Trans['Yes']=__('Yes',$WPLD_Domain); $WPLD_Trans['No']=__('No',$WPLD_Domain); Looks like you're using Wordpress - wp-includes/l10n.php defines __ as a function that translates a string (similar to gettext and its alias, _ but with an optional parameter for explicitly specifying a domain). Strictly speaking, it means nothing in PHP as it is not a pre-defined function. However, in many frameworks, like CakePHP, and other libraries the double underscore is a function used for translating strings based on the user's language