JavaScript that touches the DOM can run too early and fail before elements exist in the parsed tree. Waiting for DOM ready avoids timing bugs and missing nodes.

Move a single Git commit to another repository without adding a remote by exporting a patch and applying it in the target repository.

String-based belongs_to associations break eager loading and scope includes in ActiveRecord, causing missing-association errors. Defining associations with symbols avoids the configuration error.

Chaining grep with tail -f needs --line-buffered, otherwise matches may not appear immediately in a pipeline.

git diff omits staged changes; git diff --cached shows the changes already added to the index and ready for the next commit.

Create .xls files with the spreadsheet gem and apply number formats for currency and dates, including cell links.

Running Solr with Sunspot adds Rails search, but requires local setup, reindexing, error handling, and production configuration for a separate Solr server.

Photoshop has no preference for opening files at 100% zoom instead of fitting them to the screen. After opening, Ctrl-Alt-0 or the magnifier tool returns to full size.

Check whether HTML5 features are ready for use and how to adopt them safely with polyfills, fallbacks, or native support.

Controller specs usually skip template rendering; integrate_views in RSpec 1 or render_views in RSpec 2 enables view rendering for specs that need it.

Backport Rails 3 ActiveRecord querying and chained scopes to Rails 2, including where, order, and to_sql for scopes.

Provides Ruby 1.9 features for Ruby 1.8 applications, easing upgrades and compatibility gaps without changing the runtime.

Ruby 1.9 code coverage tool with configurable reporting and automatic merging across test suites; rcov remains for Ruby 1.8.

Install a chosen RubyGems release for consistent behavior across servers; gem update --system can target an exact version and even downgrade.

Bootstrap-styled jQuery UI theme with a cleaner look than the default jQuery UI appearance, useful when matching a modern UI without adopting the full Bootstrap framework.

Database migration and test preparation in Geordi migrate-all adapt to projects with or without parallel_tests, running the appropriate Rake tasks automatically.

git log can miss commits for a file after rename, delete, or re-add operations; --follow keeps the history visible across path changes.

XPath query syntax for selecting nodes in XML and HTML can be hard to grasp at first. A concise primer makes the core ideas easier to remember.

Feature reverts can block deployment when unfinished work must stay out of production; consolidating reverts into a few commits makes restoring them after release easier.

Cucumber feature files can live in subdirectories, but step definitions and support files need an explicit load path. Using -r features keeps subfolder runs working.

Printing GitHub wiki pages is awkward without print styles, but Markdown pages can be rendered locally and printed from generated HTML.

Printing repeated headers, footers, or watermarks is inconsistent across browsers; position: fixed works in Firefox, Opera, and Internet Explorer, but not in WebKit browsers.

Generate Git commits from Pivotal Tracker stories with geordi 0.7, now including a setup wizard, colored story states, and bold highlighting for your own stories.