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Difference between single and double square brackets in Bash
...h manual section on conditional constructs.
Use [] whenever you want your script to be portable across shells. Use [[]] if you want conditional expressions not supported by [] and don't need to be portable.
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Best practice to run Linux service as a different user
...all correctly, the same is true for other Linux distros which use the init scripts in /etc/init.d .
8 Answers
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How can I share code between Node.js and the browser?
I am creating a small application with a JavaScript client (run in the browser) and a Node.js server, communicating using WebSocket.
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What purpose does a tag serve inside of a tag?
...sign and content. One of those websites, Squarespace , has blocks of <script> tags inside of a <noscript> tag, like so:
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iPhone and OpenCV
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OpenCV does indeed work on the iphone. Use the configure script here to compile the library: cross compiling for iphone
You just have to cross-compile just as you do your apps.
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'^M' character at end of lines
When I run a particular SQL script in Unix environments, I'm am seeing a '^M' character at the end of each line of the SQL script as it is echoed to the command-line. I don't know on which OS the SQL script was originally created.
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Get contentEditable caret index position
... }
return caretPos;
}
#caretposition {
font-weight: bold;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<div id="contentbox" contenteditable="true">Click me and move cursor with keys or mouse</div>
<div id="caretpo...
How to run a PowerShell script
How do I run a PowerShell script?
15 Answers
15
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How Drupal works? [closed]
...r driven in its architecture, and there's no simple "flow" in the main PHP script for you to look though. I recently did a presentation on this very subject, and the slides are posted on slideshare, but a quick high-level summary may be useful.
Drupal's index.php file functions as a frontside cont...
A variable modified inside a while loop is not remembered
...ollowing
approach.
Say /usr/local/bin/ipaddr is the following shell script:
#! /bin/sh
host `hostname` | awk '/address/ {print $NF}'
Instead of using
/usr/local/bin/ipaddr | read A B C D
to break the local machine's IP address into separate octets, use
OIFS="$IFS"
IFS=.
set -- ...