calc() lets you mix CSS units. Ever wanted to give an element "the container's width minus 20px on each...
tl;dr: Do not use merge! for session hashes. Use update instead. Outline Let's assume you're modifying the...
Safari & Chrome Use $x() in your console: $x('//span') # selects all span elements Firefox There's an add-on.
JavaScript has no built-in functions to compare two objects or arrays for equality of their contained values.
Watch out when saying something like 1.year in Rails. The result is not a Fixnum and can cause unexpected errors...
So you want to know if you are on natty, precise, quantal, or something else? Check /etc/lsb-release. $ cat /etc/lsb-release
You might get the following error: Unable to initialize. Make sure the daemon is running. Error: Process /usr/lib/sflphone/sflphoned exited with...
Mozilla has announced that, starting with Firefox 22, the popular open source web browser will begin blocking third-party cookies...
In Ruby 1.9, instance_eval calls the block the with receiver as the first argument: In Ruby 1.8, receiver.instance_eval...
MongoMapper is a MongoDB adapter for Ruby. We've forked it so it works for Rails 2.3.x applications running...
Ruby 1.9 changed the default behavior of Module.const_defined? from what it was in Ruby 1.8 -- this can be especially...
If you open a pop-up window [1] in your Selenium tests and you want to close it, you can...
See attached link for a way to extract the conditions of a named scope in Rails 2.3.
This error can happen in Ruby 1.9. To fix it, add the following line to the top of your .js.erb...
Rails 2.3.16+ on Ruby 1.9 causes warnings like this: .../gems/activesupport-2.3.17/lib/active_support/core_ext/string/output_safety.rb:22: warning: regexp match /.../n against to UTF-8 string...
JavaScripts and CSS should be minified for production use. In Rails 3.1+ the asset pipeline will take care of this...
Prepare to explain customers what changed if your application renders PDF documents to users.
If you need to capture signatures on an IPad or similar device, you can use Thomas J Bradley's excellent...
If others on a call (Skype, SIP, ...) can not hear you loud enough, your volume levels are probably too low...
So you're using multiple remotes that offer the same branch? $ git branch -a | grep my-branch remotes/something/my-branch remotes/origin/my-branch
You either have an old version of Mocha and an edge version of Rails 3.2, or you have a new...
This page lists many query methods and options in ActiveRecord which do not sanitize raw SQL arguments and are not...
Counters are an awesome CSS feature you didn't know about. It is supported in all browsers and IE8+.
Stringex is a gem that offers some extensions to Ruby's String class. Ruby 1.9 compatible, and knows its way...