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How to 'insert if not exists' in MySQL?
...tober 2007
To start: as of the latest MySQL, syntax presented in the title is not
possible. But there are several very easy ways to accomplish what is
expected using existing functionality.
There are 3 possible solutions: using INSERT IGNORE, REPLACE, or
INSERT … ON DUPLICATE KEY U...
What's the most efficient test of whether a PHP string ends with another string?
The standard PHP way to test whether a string $str ends with a substring $test is:
13 Answers
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Is there a JSON equivalent of XQuery/XPath?
When searching for items in complex JSON arrays and hashes, like:
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How to play a notification sound on websites?
When a certain event occurs, I want my website to play a short notification sound to the user.
10 Answers
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Getting reference to the top-most view/window in iOS application
...f everything else in the application, sort of like a UIAlertView. When I init the manager that listens for NSNotification events and adds views in response, I need to get a reference to the top-most view in the application. This is what I have at the moment:
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Windows XP or later Windows: How can I run a batch file in the background with no window displayed?
... run asynchronously? Typically one batch file runs another synchronously with the call command, and the second one would share the first one's window.
You can use start /b second.bat to launch a second batch file asynchronously from your first that shares your first one's window. If both batch fi...
How do I get a value of datetime.today() in Python that is “timezone aware”?
...e value of datetime.today() to calculate how long ago something was. But it complains:
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E731 do not assign a lambda expression, use a def
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general. The use of the assignment statement eliminates the sole
benefit a lambda expression can offer over an explicit def statement
(i.e. that it can be embedded inside a larger expression)
Assigning lambdas to names basically just duplicates the functionality of def - and in general, it'...
Using git, how do I ignore a file in one branch but have it committed in another branch?
... to Heroku . The source code tree includes a bunch of mp3 files (the website will be for a recording project I was heavily involved with).
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Fatal error: Class 'ZipArchive' not found in
...' on Linux server, but when I try to run the script to create the zip file it gives the fatal error
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