Angular ngSrc leaves src unchanged when the bound value becomes empty; using //:0 forces an invalid blank image source so the browser clears it.

Broken Hiera YAML can cause Puppet catalog failures with vague parser or nil errors, often after an upgrade or an unquoted facter interpolation.

tel: links let smartphone users call phone numbers from web pages, and a small Rails helper turns human-readable numbers into clean clickable dial links.

Interactive visualization of hierarchical data in bubble trees, built on jQuery and RaphaelJS, for exploring spending and other nested datasets.

Small JavaScript library for drawing scalable graphics on the web; useful for custom charts and image manipulation widgets.

Opt-in alternative to Turbolinks for partial page updates, AJAX form submission, and redirect handling without full page reloads.

Undocumented software can be as useless as solving the wrong problem; writing the README first aligns the implementation with how people will use it.

Permission error in vim can block saving an edited file opened without sudo; :w !sudo tee % or a :w!! shortcut writes it with elevated privileges.

Rails engine gem for creating branded short URLs on your own domain, resolving them for visitors, and collecting basic usage metrics.

Backspace in RubyMine can delete whole lines instead of whitespace when smart indentation is enabled; adjusting the editor's smart key settings restores normal deletion behavior.

bower may fail on Ubuntu when /usr/bin/node is missing; using Ubuntu’s node package can also leave bower unresponsive. A symlink to nodejs fixes the mismatch.

Ruby 1.8.7 to 2.1.2 upgrades are usually straightforward for Rails 3.2 apps, with a few compatibility fixes for load paths, debugging, removed gems, and UTF-8 defaults.

DB BAHN order numbers on credit card statements can be used to look up details of past rides on the Deutsche Bahn ticket portal.

Google Calendar stops syncing in Thunderbird on Ubuntu, leaving calendars inaccessible and password prompts unresolved. Reinstalling the calendar add-ons from Thunderbird can restore access.

Bundler’s default release task can publish private gems to rubygems.org; allowed_push_host in gem metadata restricts pushes to a trusted host.

D3-based charting library for time-series data with responsive, consistent layouts for line charts, scatterplots, histograms, rug plots, and simple linear regression.

Use oj to generate JSON much faster for large Ruby hashes, but account for symbol handling, Rails compatibility, and HTML escaping to avoid XSS.

RVM installs bundler into @global, so one version can affect every gemset and Ruby. Reinstalling a specific version in @global restores a compatible setup.

Bootstrap print styles append link URLs to anchors by default; overriding a[href]:after prevents printed hrefs on paper.

Restangular can reuse AngularJS $http response cache for individual requests or globally, but stale data requires explicit invalidation.

JavaScript library for drag-and-drop interactions with more control than native HTML5 support, plus touch and multi-touch behavior for modern browsers.

Angular requires trusted HTML for ng-bind-html; a custom $sce filter can sanitize values and replaces the removed ng-bind-html-unsafe directive.

Add custom fonts to Ubuntu by placing font files in ~/.fonts and refreshing the font cache, or install them through the font preview window.

Firefox 5.0.1 no longer runs on Ubuntu 14.04, so Selenium test setups need browser and gem updates to keep Rails 2.3 and Cucumber projects working.