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What is the purpose of the : (colon) GNU Bash builtin?
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$ ./vecho
$ VERBOSE=1 ./vecho
Verbose echo is ON
This makes for a clean script. This cannot be done with '#'.
Also,
: >afile
is one of the simplest ways to guarantee that 'afile' exists but is 0 length.
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ASP.NET MVC Ajax Error handling
... filters.Add(new HandleExceptionAttribute());
}
and then write this script on the layout or Master page:
<script type="text/javascript">
$(document).ajaxError(function (e, jqxhr, settings, exception) {
e.stopPropagation();
if (jqxhr !...
Local file access with JavaScript
Is there local file manipulation that's been done with JavaScript? I'm looking for a solution that can be accomplished with no install footprint like requiring Adobe AIR .
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socket.io and session?
...n exposes the app to XSS attacks by exposing the session ID at the client (scripting) level.
Check this solution instead (for Socket.IO >= v0.7). See docs here.
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How does the “this” keyword work?
...he this keyword is and how it is correctly (and incorrectly) used in JavaScript on the Stack Overflow site.
22 Answers
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How to detect page zoom level in all modern browsers?
...iv id=dummyElement>Dummy element to test media queries.</div>
<script>
var mediaQueryMatches = function(property, r) {
var style = document.getElementById('binarysearch');
var dummyElement = document.getElementById('dummyElement');
style.sheet.insertRule('@media (' + property + ...
Debugging sqlite database on the device
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I use this shell script on my MAC, that copies database directly to my home folder. Easy one click solution, just change package name (com.example.app) and database name (database.sqlite)
Simple Script
#!/bin/bash
adb -d shell 'run-as com.e...
How can I set the Sender's address in Jenkins?
... to configure sender's email address on a job level without writing custom scripts to send email.
– insider
Mar 13 '19 at 10:30
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Why am I seeing an “origin is not allowed by Access-Control-Allow-Origin” error here? [duplicate]
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Javascript is limited when making ajax requests outside of the current domain.
Ex 1: your domain is example.com and you want to make a request to test.com => you cannot.
Ex 2: your domain is example.com and you want to ...
How to replace spaces in file names using a bash script
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Use rename (aka prename) which is a Perl script which may be on your system already. Do it in two steps:
find -name "* *" -type d | rename 's/ /_/g' # do the directories first
find -name "* *" -type f | rename 's/ /_/g'
Based on Jürgen's answer and able to ha...