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Why malloc+memset is slower than calloc?
It's known that calloc is different than malloc in that it initializes the memory allocated. With calloc , the memory is set to zero. With malloc , the memory is not cleared.
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Synchronization vs Lock
java.util.concurrent API provides a class called as Lock , which would basically serialize the control in order to access the critical resource. It gives method such as park() and unpark() .
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Error message Strict standards: Non-static method should not be called statically in php
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to
public static function getInstanceByName($name=''){
if you want to call them statically.
Note that static methods (and Singletons) are death to testability.
Also note that you are doing way too much work in the constructor, especially all that querying shouldn't be in there. All your const...
How to use `string.startsWith()` method ignoring the case?
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The big problem here is the performance. For small Strings no problem, but if you have a big one... I mean... Do you really will do a toUpperCase in a 1mb String just to compare 4-10 inicial characters?
– Dyorgio
Apr 7 '16 at 16:52
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Definition of a Balanced Tree
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The constraint is generally applied recursively to every subtree. That is, the tree is only balanced if:
The left and right subtrees' heights differ by at most one, AND
The left subtree is balanced, AND
The right subtree is balanced
According t...
Adding a favicon to a static HTML page
...t's 16x16px and it's sitting in the same directory as the HTML file; it's called favicon.ico) as the "tab" icon as it were? I have read up on Wikipedia and looked at a few tutorials and have implemented the following:
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Python AttributeError: 'module' object has no attribute 'Serial' [duplicate]
...he class. So, you must write:
from serial import Serial
You need to install serial module correctly: pip install pyserial.
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Set default syntax to different filetype in Sublime Text 2
... default filetype for a certain file extension in Sublime Text 2? Specifically I want to have *.cfg files default to having Ini syntax highlighting but I cannot seem to figure out how I could create this custom setting.
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Possible reason for NGINX 499 error codes
... connection before the server answered the request. In my experience is usually caused by client side timeout. As I know it's an Nginx specific error code.
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How to get a list of user accounts using the command line in MySQL?
...RE user='someuser' and host='somehost'; If you do DELETE FROM mysql.user;, all users are gone. Logins after the next mysql restart or FLUSH PRIVILEGES; eliminate users from memory. Here is an example of one of my posts on doing DELETE FROM mysql.user responsibly : dba.stackexchange.com/questions/461...