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Threads vs Processes in Linux
...nes a task, with a configurable level of sharing, among which are:
CLONE_FILES: share the same file descriptor table (instead of creating a copy)
CLONE_PARENT: don't set up a parent-child relationship between the new task and the old (otherwise, child's getppid() = parent's getpid())
CLONE_VM: sha...
Meaning of tilde in Linux bash (not home directory)
... ~+ is roughly the same as . However, to use something like ./file it has to go to the file system and figure out where . is located - it takes a few cycles. Using ~+ saves it the work by simply returning the contents of the shell variable $PWD which is already defined as you traverse ...
How to apply a style to an embedded SVG?
...yle.css)".
Of course you can directly link to the stylesheet from the svg file too, without doing any scripting. Either of the following should work:
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet href="my-style.css" type="text/css"?>
<svg xmlns="http://www.w3.org/2000/svg"...
What does “hashable” mean in Python?
...gt;>>
>>> hash([1, 2])
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'list'
>>> hash({1, 2})
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'se...
Should I use Vagrant or Docker for creating an isolated environment? [closed]
...Box (or others) with a huge overhead. It requires you to have a hard drive file that can be huge, it takes a lot of ram, and performance may be not very good.
Docker on the other hand uses kernel cgroup and namespacing via LXC. It means that you are using the same kernel as the host and the same fi...
Android app in Eclipse: Edit text not showing on Graphical layout
...9
buildToolsVersion "19.1"
4) The IDE will prompt you to sync the Gradle file with your project, click Yes.
5) Open your activity file and then change the 'Android version to use when rendering layouts in IDE' to 'API 19'. This is the green colored Android Bot towards the right on the preview win...
How to set the thumbnail image on HTML5 video?
...];
$data = str_replace(' ', '+', $data);
$data = base64_decode($data);
$file = 'text.jpg';
$dataname = file_put_contents($thumbs_dir . $file, $data);
}
?>
//jscode
<script type="text/javascript">
var videos = <?= json_encode($videos); ?>;
var video = document.getElementById('vid...
iPhone: Detecting user inactivity/idle time since last screen touch
...ve your application delegate subclass UIApplication. In the implementation file, override the sendEvent: method like so:
- (void)sendEvent:(UIEvent *)event {
[super sendEvent:event];
// Only want to reset the timer on a Began touch or an Ended touch, to reduce the number of timer resets.
...
Generating a UUID in Postgres for Insert statement?
...ib package, you'll get the error: ERROR: could not open extension control file "/usr/share/postgresql/9.3/extension/uuid-ossp.control": No such file or directory
– Drew Noakes
Jan 29 '14 at 16:27
...
What is the difference between the | and || or operators?
... = 10 (0X02) Read-Write = 11 (0X03). One useful example would be opening files. A simple example would be:
File.Open(FileAccess.Read | FileAccess.Write); //Gives read/write access to the file
|| is a logical OR. This is the way most people think of OR and compares two values based on their...