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Getting a better understanding of callback functions in JavaScript
I understand passing in a function to another function as a callback and having it execute, but I'm not understanding the best implementation to do that. I'm looking for a very basic example, like this:
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CSS /JS to prevent dragging of ghost image?
...ing under the assumption that the ghost image is visual indicator for drag-and-drop (which it is), and that most people who want to hide the ghost image generally don't care if drag-and-drop is disabled altogether.
– BoltClock♦
Jun 26 '14 at 1:28
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Git: fatal: Pathspec is in submodule
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Removing the directory from git and adding it again worked for me:
git rm --cached directory
git add directory
This works if you purposefully removed the .git directory because you wanted to add directory to your main git project. In my specific case, ...
Markdown to create pages and table of contents?
...xample for more than one word. All words are broken down to no caps lock, and no spaces.
– Rick
Jul 9 '16 at 17:46
6
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PostgreSQL LIKE query performance variations
...text indexes is not for the LIKE operator at all, it has its own operators and doesn't work for arbitrary strings. It operates on words based on dictionaries and stemming. It does support prefix matching for words, but not with the LIKE operator:
Get partial match from GIN indexed TSVECTOR column
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Fast way to get image dimensions (not filesize)
I'm looking for a fast way to get the height and width of an image in pixels. It should handle at least JPG, PNG and TIFF, but the more the better. I emphasize fast because my images are quite big (up to 250 MB) and it takes soooo long to get the size with ImageMagick's identify because it obv...
Difference between std::result_of and decltype
I have some trouble understanding the need for std::result_of in C++0x. If I understood correctly, result_of is used to obtain the resulting type of invoking a function object with certain types of parameters. For example:
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Why rename synthesized properties in iOS with leading underscores? [duplicate]
...t at the instance variable. But the point is, _qux is an instance variable and self.qux (or [self qux]) is the message qux sent to object self.
We use the instance variable directly in -dealloc; using the accessor method instead would look like this (though I don't recommend it, for reasons I'll ex...
SET NAMES utf8 in MySQL?
...g by default from client connections (many are, depending on your location and platform.)
Read http://www.joelonsoftware.com/articles/Unicode.html in case you aren't aware how Unicode works.
Read Whether to use "SET NAMES" to see SET NAMES alternatives and what exactly is it about.
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Script to kill all connections to a database (More than RESTRICTED_USER ROLLBACK)
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Updated
For MS SQL Server 2012 and above
USE [master];
DECLARE @kill varchar(8000) = '';
SELECT @kill = @kill + 'kill ' + CONVERT(varchar(5), session_id) + ';'
FROM sys.dm_exec_sessions
WHERE database_id = db_id('MyDB')
EXEC(@kill);
For MS SQL Se...