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Fastest way to check if a string is JSON in PHP?
...any other literal can potentially greatly speed this one up when many of incoming strings are expected to be non-JSON.
– Oleg V. Volkov
Sep 25 '12 at 17:03
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How do I efficiently iterate over each entry in a Java Map?
...ou do that, then it won't work as Entry is a nested Class in Map. java.sun.com/javase/6/docs/api/java/util/Map.html
– ScArcher2
Mar 22 '10 at 13:30
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How to convert an entire MySQL database characterset and collation to UTF-8?
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Use the ALTER DATABASE and ALTER TABLE commands.
ALTER DATABASE databasename CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
ALTER TABLE tablename CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
Or if you're still on MySQL 5.5.2 or older which di...
Upgrade python in a virtualenv
...grade the version of python used in a virtualenv (e.g. if a bugfix release comes out)?
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How to print the full traceback without halting the program?
... are automatically reclaimed when garbage collection is enabled and they become unreachable, but it remains more efficient to avoid creating cycles.
On the other hand, by allowing you to access the traceback associated with an exception, Python 3 produce a less surprising result:
import traceb...
How to achieve function overloading in C?
...le functions (type in function name)
c subset of c++ (if You can use a c++ compiler)
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Java - get pixel array from image
...sue, the first method is absolutely not the way to go. The getRGB() method combines the alpha, red, green and blue values into one int and then returns the result, which in most cases you'll do the reverse to get these values back.
The second method will return the red, green and blue values direct...
Calculate business days
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Here's a function from the user comments on the date() function page in the PHP manual. It's an improvement of an earlier function in the comments that adds support for leap years.
Enter the starting and ending dates, along with an array of any holidays th...
Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
...n, will argv[0] always be the name of the executable? Or is this just a common convention and not guaranteed to be true 100% of the time?
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What is the significance of load factor in HashMap?
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edited Jun 20 at 9:12
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answered Jun 5 '12 at 17:17
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