require 'logger' log = Logger.new('log/mylog.log') log.info 'Some information' log.debug 'Debugging hints' log.error StandardError.new('Something went wrong') Logger does a number of things well: Message type (info / debug / error...
Log entries are timestamped Writing log output is synchronized between threads Logged errors are printed with full backtraces If you don't like the output format, you can...
Automatically convert bitmap images like JPEGs, GIFs and PNGs to the crisp, clean, scalable vector art of EPS, SVG, and PDF with the world's best auto-tracing software.
...of things, and grownup professionals plan for it, just as they plan for budget shortfalls and extra rounds of revision...
...work cross-domain by tunneling all communications through an IFRAME on your page. Note sure if it's a wise idea, but it's a thing now...
jQuery plugin to fire events when user's cursor aims at particular dropdown menu items. For making responsive mega dropdowns...
...let you move back and forth through the user's history, as well as -- starting with HTML5 -- manipulate the contents of the history stack...
This article shows how to create a Sass mixin for a colored button. The button's foreground color is dynamically chosen between either black or white, depending on the given...
...background color. It's a nice intro into @if and @else conditionals in Sass...
...helpers for poking around at your Capybara driven browser's cookies in integration tests. Supports Capybara's bundled drivers (rack-test, Selenium Webdriver), and adapters for other drivers may be...
Twitter's Bootstrap CSS blueprint as a jQuery UI theme. Even if you don't want to use Bootstrap as...
When you simply want to get to know Puppet, follow puppetlabs’ Learning Puppet Docs. They give you a handy introduction inside a virtual machine they provide. You can watch the...
...cheatsheat and their learn-puppet virtual machine. #Installation and basic configuration on Ubuntu Linux: sudo apt-get install puppet, then follow this guide starting at "Creating a Puppet configuration"
Cucumber's docstrings let you add long strings to a step like this: # foo.feature Given this text: """ First line Second line Second Paragraph """ # foo_steps.rb Given /^this text:$/ |docstring| puts docstring.split...
# Does not work: Given this text: """ Docstrings work like this: \"\"\" Docstring example \"\"\" You see? """ Self-made Solution Cucumber Transforms to the rescue! Transforms are run on step arguments after...
There seems to be no way to use therubyracer -v '0.11.4' and libv8 -v '3.11.8.17' on OS X Mavericks. However, running bundle update therubyracer worked for me. It installed therubyracer...
...v '0.12.1' and libv8 -v '3.16.14.3' and I had not side effects. Log of my attempts to get it working Probably you got here when bundling failed building native extensions...
For my Gem Session project Holly I ran the Ironman of drag'n...
...drop implementations: Dragging in nested lists User-definable order of items Complicated item elements with super-custom CSS and other Javascript functionality Items that can be both leaves and containers...
has_one :note end class Note < ActiveRecord::Base belongs_to :project end Now say we need a validation that ensures that a description is set (validates_presence_of :description...
...within Note but only if the Project has a flag called external set to true. The following code will lead to some problems as the associated object is not present...
When you have a complex recipe setup with multistage deployment you may run into this error: `role_list_from': unknown role `something' (ArgumentError) Consider this task definition: namespace :foo do...
...task :bar, :roles => :something do # do crazy stuff end end Whenever we call foo.bar in our recipe, Capistrano will fail if you deploy to a stage where none of the...
I use the TypeScript compiler for this, since its output is more minimal than Babel's. The following will transpile all src/*.js files into a file build.js:
npx tsc src/*.js --target ES5 --allowJs --outFile build.js The output will only transpile ES6 syntax. It will not include any polyfills for missing APIs...
If you're using Paperclip to store and convert images attached to your models, processing a lot of images will probably cause headache for your system operation colleagues because CPU...
If you're on Unix you can use nice to tell the Kernel scheduler to prefer other processes that request CPU cycles. Keep in mind that this will not...
...using form_for you can give the form's target URL either as a string or an array: form_for(admin_user_path(@user)) do...
# same as:
...path and polymorphic_url If you would like to generate a path or URL string from an array of route components just as form_for does, you can use polymorphic...
...restangular collection and you want to remove an element from it, after you've successfully deleted it from the server. The README suggests to say something like $scope.users = _.without($scope.users...
...horribly when you want to use restangular's attributes on that collection. This is simply because of the way _.without works: It returns a new array with all elements except...
...assignable_values does not invalidate a record even when an attribute value becomes unassignable. See this example about songs: class Song < ActiveRecord::Base belongs_to :artist belongs_to :record_label...
We'll create two record labels with one artist each and create a song for one artist. When we change the song's record label, its artist is still...
...with Xfce's sometimes arcane configuration UI, this can be a huge time waster and super-annoying if you need to get work done the same day. This card describes...
...how to setup a classic panel layout as you might be used to from Gnome 2 or Windows (see screenshot below). You can use this to quickly get productive in...
...a gem and you have a Gemfile in your project directory, you might be surprised that your gem dependencies aren't already required in your specs. Here is some info...
That also means that if you have an embedded Rails app in your spec folder (like has_defaults), and you boot its environment, it should call Bundler.require for you...
...modify (e.g. add 2px) a Sass variable that defines multiple values as one (e.g. for short-hand CSS definitions such ass padding), you can by using nth. It's ugly...
...While you could split up such variables into multiple values (e.g. combined padding into one for vertical and one for horizontal padding) in your own Sass definitions, when using some...
By default, Devise redirects to a sign-in form when accessing a route that requires authentication. If for some reason you do not want this, but use Basic Authentication (and...
...disable password reset. Note that forcing Basic Auth means there won't be a pretty sign-in form any more which would include a link for sign-up or password...