What does 100% mean in CSS?

When writing a Sass function, you may run into an error message that may be confusing:

@function rules may not contain style rules.

What Sass is trying to tell you is that a line in your Sass function is computing a result that is neithe...

January has been a very bad month for Ruby on Rails developers, with two high-severity security bugs permitting remote code execution found in the framework and a separate-but-related compromise on rubygems.org, a community resource which virtua...

TL;DR: Variables not declared using var are stored outside the current scope, most likely in the global scope (which is window in web-browsers).

Declaring a variable in Javascript is done like var x = 5. This creates a new variable...

It is a common misunderstanding that all [op]=-operators work the same way, but actually they don't.

||= and &&=

Those are special cases, because the assignment will only happen if the first variable passes the check (false or `ni...

Summary

• Use return to return from a method. return accepts a value that will be the return value of the method call.
• Use break to quit from a block and from the method that yielded to the block. break accepts a value that suppl...

Lately, we’ve been exploring ways to offer web apps that perform like native apps on mobile devices. For this short sprint we targeted mobile WebKit browsers—especially the default browsers on iOS and Android—because of their widespread use and ex...

Let's say you have commits that change a file (and looking at the commit details show you the changes, etc). Now, when you do a git log you see them, but when you say git log that.file these commits don't show up? This is for you.

The reason ...

Holly Schinsky from Adobe shows some of Bootstrap's capabilities. The combination of explanation, screenshots and source code makes it easy to understand

Rails understands a :limit options when you create columns in a migration. Its meaning depends on the column type, and sometimes the supplied value.

[The documentation](http://apidock.com/rails/ActiveRecord/ConnectionAdapters/TableDefinition/co...

What PDFKit is

• PDFKit converts a web page to a PDF document. It uses a Webkit engine under the hood.
• For you as a web developer this means you can keep using the technology you are familar wit...