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How to set environment variable for everyone under my linux system?
...y /etc/profile.d/; any .sh files in there will be sourced by /etc/profile. It's slightly neater to keep your custom environment stuff in these files than to just edit /etc/profile.
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How to use GROUP_CONCAT in a CONCAT in MySQL
If I have a table with the following data in MySQL:
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Use of #pragma in C
What are some uses of #pragma in C, with examples?
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How can I perform a `git pull` without re-entering my SSH password?
Is it possible to configure git/ssh so I don't have to enter my passphrase every time I want to perform a git pull ? Note that the repo is a private one on github.
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Detect whether there is an Internet connection available on Android [duplicate]
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The getActiveNetworkInfo() method of ConnectivityManager returns a NetworkInfo instance representing the first connected network interface it can find or null if none of the interfaces are connected. Checking if this method returns null should be enough to tell if an int...
Displaying the #include hierarchy for a C++ file in Visual Studio
...arge Visual C++ project that I'm trying to migrate to Visual Studio 2010. It's a huge mix of stuff from various sources and of various ages. I'm getting problems because something is including both winsock.h and winsock2.h .
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What is INSTALL_PARSE_FAILED_NO_CERTIFICATES error?
I was trying to change my default/main/startup (whatever you call it) activity by editing the androidmanifest.xml file. All i did was change the android:name property. however, this completely broke the entire app. when I try to install it fails and reads.
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Mocha / Chai expect.to.throw not catching thrown errors
...t If I wrap the test case in try and catch and assert on the caught error, it works.
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Why use apparently meaningless do-while and if-else statements in macros?
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The do ... while and if ... else are there to make it so that a
semicolon after your macro always means the same thing. Let's say you
had something like your second macro.
#define BAR(X) f(x); g(x)
Now if you were to use BAR(X); in an if ... else statement, where the bodi...
Sending email with PHP from an SMTP server
...-mail through a server that requires SMTP Auth, you really need to specify it, and set the host, username and password (and maybe the port if it is not the default one - 25).
For example, I usually use PHPMailer with similar settings to this ones:
$mail = new PHPMailer();
// Settings
$mail->Is...