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Modify alpha opacity of LESS variable
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The site documentation gives the answer:
background: fade(@blue, 20%);
The function name is fade not alpha according to that document.
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Converting RGB to grayscale/intensity
...on color in general:
Wikipedia Luma
Bruce Lindbloom 's outstanding web site
chapter 4 on Color in the book by Colin Ware, "Information Visualization", isbn 1-55860-819-2;
this long link to Ware in books.google.com
may or may not work
cambridgeincolor :
excellent, well-written
"tutorials on how...
How do I syntax check a Bash script without running it?
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Time changes everything. Here is a web site which provide online syntax checking for shell script.
I found it is very powerful detecting common errors.
About ShellCheck
ShellCheck is a static analysis and linting tool for sh/bash scripts. It's mainly focused ...
How to set environment variable for everyone under my linux system?
...variables. The best you can do is arrange for any specific shell to have a site-specific initialization.
If you put it in /etc/profile, that will take care of things for most posix-compatible shell users. This is probably "good enough" for non-critical purposes.
But anyone with a csh or tcsh shell...
Markdown and image alignment
I am making a site that publishes articles in issues each month. It is straightforward, and I think using a Markdown editor (like the WMD one here in Stack Overflow) would be perfect.
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How can I solve a connection pool problem between ASP.NET and SQL Server?
The last few days we see this error message in our website too much:
22 Answers
22
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Differences between cookies and sessions?
...fier can be passed in the URL or saved into a session cookie.
Most modern sites use the second approach, saving the identifier in a Cookie instead of passing it in a URL (which poses a security risk). You are probably using this approach without knowing it, and by deleting the cookies you effective...
What is the difference between id and class in CSS, and when should I use them? [duplicate]
... when you want to consistently style multiple elements throughout the page/site. Classes are useful when you have, or possibly will have in the future, more than one element that shares the same style. An example may be a div of "comments" or a certain list style to use for related links.
Addition...
How do I access the host machine from the guest machine? [closed]
.... Add a line like this:
192.168.78.1 myrubyapp
Now you can access the site in IE at the address http://myrubyapp:3000
If you use virtual hosts under Apache you'll need this to provide the correct server name.
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How to load up CSS files using Javascript?
...el = 'stylesheet';
link.type = 'text/css';
link.href = 'http://website.com/css/stylesheet.css';
link.media = 'all';
head.appendChild(link);
}
This example checks if the CSS was already added so it adds it only once.
Put that code into a javascript file, have the end-user simply i...