RSpec one-liners can assert expectations on subject with implicit example descriptions, using should or is_expected in expect-based syntax.

Angular directives can project original content into a template, and the transclusion function allows custom processing before insertion into the DOM.

Logstalgia can export a PPM stream for recording a synchronized H.264 video through ffmpeg or avconv.

Local changes can block git pull --rebase; automatic stashing saves and reapplies them around the pull, but conflicts may still occur.

Bundler needs network access to api.rubygems.org; behind a proxy, https_proxy or http_proxy lets bundle install fetch gems and deploy with Capistrano.

Safer browser console logging makes debugging easier: %o interpolation keeps values readable, and object shorthand lets structured data expand interactively.

Rails hashes can be turned into URL query strings with Hash#to_query; browser-side nested objects can be serialized with jQuery $.param.

Rails 2.3 tests can fail with NoMethodError: undefined method 'cache' for Gem:Module when used with newer RubyGems; downgrading RubyGems restores generator lookup behavior.

Geordi 1.3 adds Cucumber support with @solo handling, Capistrano 2/3 deployment fixes, and updated Firefox setup for selenium testing.

Use SQL views in a Rails app without switching the schema format to SQL; Scenic adds versioned, reversible migrations and keeps view definitions in SQL files.

Dashboard and query tools for Elasticsearch provide local access to Kibana and Sense through Marvel plugins.

column aligns delimited text into readable tables in bash, making pipe-separated output and other simple listings easy to format.

Script to migrate test suites from RSpec 2 to RSpec 3, including syntax beyond should and expect.

Identify processes with pages in swap and rank them by VmSwap; swap usage reflects page activity, not total memory pressure.

List PostgreSQL database sizes in megabytes with pg_database_size, useful for spotting large databases and planning storage.

Rails treats html_safe strings as already escaped, which can block escaping when safe HTML must be passed through JSON or shown as text. Converting to a plain String restores escaping.

HTML email layout remains fragile, and several 2015 email changes made rendering problems worse rather than better.

rack-mini-profiler helps spot slow Rack and Rails requests by measuring SQL queries, memory allocation, and CPU time.

Remove a Puppet certificate request from the certificate authority on the puppetmaster when a node needs to be re-enrolled or cleaned up.

Handy CSS tricks solve common layout and styling problems with concise expressions and modern browser features.

Use Sizzle via $.find to select descendants from plain DOM nodes when jQuery collections are unavailable, too slow, or awkward for whole-document work.

Opera Mini leaves many modern front-end features unusable on mobile, especially in markets where it dominates. Practical workarounds help keep sites functional.