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How to replace an entire line in a text file by line number
I have a situation where I want a bash script to replace an entire line in a file.
The line number is always the same, so that can be a hard-coded variable.
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How can I tell if one commit is a descendant of another commit?
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If you want to check this programmatically (e.g. in script), you can check if git merge-base A B is equal to git rev-parse --verify A (then A is reachable from B), or if it is git rev-parse --verify B (then B is reachable from A). git rev-parse is here needed to convert from ...
How do I kill background processes / jobs when my shell script exits?
I am looking for a way to clean up the mess when my top-level script exits.
13 Answers
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jQuery event to trigger action when a div is made visible
...en</div>
<button id="show">Show hidden div</button>
<script type="text/javascript" src="https://code.jquery.com/jquery-1.9.1.min.js"></script>
share
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improve th...
Make multiple-select to adjust its height to fit options without scroll bar
...eed for jquery. The hidden overflow gets rid of the scrollbar, and the javascript makes it the right size.
<select multiple='multiple' id='select' style='overflow:hidden'>
<option value='foo'>foo</option>
<option value='bar'>bar</option>
<option value='abc'>abc&l...
How to install a specific version of a ruby gem?
...may prefix it by sudo if rvm was installed globally. Or run /usr/local/rvm/scripts/rvm if your command rvm is not in your global PATH. If rvm installation process failed, see the troubleshooting section.
Troubleshooting:
If you still have the old version, you may try to install rvm (ruby versio...
Bower and devDependencies vs dependencies
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devDependencies are for the development-related scripts, e.g. unit testing, packaging scripts, documentation generation, etc.
dependencies are required for production use, and assumed required for dev as well.
Including devDependencies within dependencies, as you have it...
How to get started with Windows 7 gadgets
...ferent one out on your own.
Gadgets are written in HTML, CSS, and some IE scripting language (generally Javascript, but I believe VBScript also works). For really fancy things you might need to create an ActiveX object, so C#/C++ for COM could be useful to know.
Gadgets are packaged as ".gadget" ...
The character encoding of the HTML document was not declared
...arset="utf-8" />
<title>Voice clip upload</title>
<script src="voiceclip.js"></script>
</head>
<body>
<h2>Upload Voice Clip</h2>
<form id="upload_form" enctype="multipart/form-data" method="post">
<input type="file" nam...
How do I set the offset for ScrollSpy in Bootstrap?
... h tags ad dt tags with ids link-able (Like github does) with some sort of script that injects a little link to the left of them; adding the following to your CSS will take care of the nav-bar offset for you:
body {
margin-top: 40px;/* make room for the nav bar */
}
/* make room for the nav ba...