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Select last N rows from MySQL
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238
You can do it with a sub-query:
SELECT * FROM (
SELECT * FROM table ORDER BY id DESC LIMIT...
How to Reload ReCaptcha using JavaScript?
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33
Important: Version 1.0 of the reCAPTCHA API is no longer supported, please upgrade to Version 2...
How to create empty text file from a batch file?
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13 Answers
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Parallel.ForEach vs Task.Run and Task.WhenAll
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163
In this case, the second method will asynchronously wait for the tasks to complete instead of bl...
Change the font of a UIBarButtonItem
... forState:(UIControlState)state
but this is for iOS5 only. For iOS 3/4, you will have to use a custom view.
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Unix shell script find out which directory the script file resides?
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edited Feb 28 '16 at 3:37
James Ko
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Creating PHP class instance with a string
...er cool stuff you can do in php are:
Variable variables:
$personCount = 123;
$varname = 'personCount';
echo $$varname; // echo's 123
And variable functions & methods.
$func = 'my_function';
$func('param1'); // calls my_function('param1');
$method = 'doStuff';
$object = new MyClass();
$objec...
How to set a Django model field's default value to a function call / callable (e.g., a date relative
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143
The question is misguided. When creating a model field in Django, you are not defining a functi...
What is the difference between JOIN and UNION?
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UNION puts lines from queries after each other, while JOIN makes a cartesian product and subse...
How to initialize a dict with keys from a list and empty value in Python?
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dict.fromkeys([1, 2, 3, 4])
This is actually a classmethod, so it works for dict-subclasses (like collections.defaultdict) as well. The optional second argument specifies the value to use for the keys (defaults to None.)
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