I use only django framework with his ORM. And there is some code: User.objects.filter(username=\'test\').exists()
I\'m trying to optimise my query. Basically I have an Department table and a document table. Each document belongs to a department and each document can be a specific type.
In my Perl script I am using LWP::Simple::getstore to retrieve an image and store as file. But before storing how to check if that f开发者_开发技巧ile already exists?
Let\'s say I run the following query: CREATE TEMPORARY TABLE IF NOT EXISTS FISH SELECT \'a\'; it will create a temporary table with \'a\' in it. Now, if I run the query again, the tab开发者_如何学P
I have a bizarre problem. I write a file to the SD card and then I remove the SD card. With the card removed, I then check for the existence of the file with File.exists.
I am making a game which has a global (static) class called MedGameController. In my class I have two arrays of fifteen objects each which hold the logic for each players开发者_JS百科 units. In the ga
I am familiar with Sybase which allows queries with format: IF EXISTS () THEN ... ELSE ... END IF (or very close).This a powerful statement that allows: \"if exists, then update, else insert\".
This question already has answers here: Is there an "exists" function for jQuery? (47 answers)
<%= image_tag message.photo.url(:small) %> I have paperclip installed and the above code displays an image that the user uploads which has been resized to :small (in this case 40x40px. How can
I know you can check if an element exists with $(\'di开发者_如何学Cv\').length, but when an element is destroyed using .remove(), .length still reports the div exists. How can I find whether or not it
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