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When you exit a C application, is the malloc-ed memory automatically freed?
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It depends on the operating system. The majority of modern (and all major) operating systems will free memory not freed by the program when it ends.
Relying on this is bad practice and it is better to free it explicitly. The issue isn't just that your code looks bad. You may decide you w...
Access denied for user 'test'@'localhost' (using password: YES) except root user
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Do not grant all privileges over all databases to a non-root user, it is not safe (and you already have "root" with that role)
GRANT <privileges> ON database.* TO 'user'@'localhost' IDENTIFIED BY 'password';
This statement create...
opengl: glFlush() vs. glFinish()
I'm having trouble distinguishing the practical difference between calling glFlush() and glFinish() .
8 Answers
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对外网用户的squid代理+认证 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ongproxynew# make depend
jiulongproxynew# make
jiulongproxynew# make install
3、配置/etc/rc.conf：
hostname="jiulongproxynew.jscpu.com"
defaultrouter="221.6.117.97"
ifconfig_em0="inet 221.6.117.50 netmask 255.255.255.240"
ifconfig_em1="inet 128.0.0.4 netmask 255.255.252.0"
sendmail_ena...
Add a “hook” to all AJAX requests on a page
...ttle investigating and this is what I came up with.
I'm not sure that it's all that useful as per the comments in the script and of course will only work for browsers using a native XMLHttpRequest object.
I think it will work if javascript libraries are in use as they will use the native object if p...
How to sum a variable by group
...as "model Frequency by Category" or "Frequency depending on Category". Not all languages use a special operator to define a symbolic function, as done in R here. Perhaps with that "natural-language interpretation" of the tilde operator, it becomes more meaningful (and even intuitive). I personally f...
Select Last Row in the Table
...cending.
As an example, if you have a time stamp when the upload was done called upload_time, you'd do something like this;
For Pre-Laravel 4
return DB::table('files')->order_by('upload_time', 'desc')->first();
For Laravel 4 and onwards
return DB::table('files')->orderBy('upload_time',...
Fully backup a git repo?
Is there a simple way to backup an entire git repo including all branches and tags?
13 Answers
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How do I get the backtrace for all the threads in GDB?
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Generally, the backtrace is used to get the stack of the current thread, but if there is a necessity to get the stack trace of all the threads, use the following command.
thread apply all bt
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Can two applications listen to the same port?
...cation listening on a single port" that's the reason why ports exist -- to allow multiple applications to share the network without conflicts.
– S.Lott
Nov 7 '09 at 19:41
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