SVGs can be styled with CSS only when embedded inline; using them as images or sprites blocks styling, and IE support is limited.

reverse_order breaks on complex SQL sorting and can generate invalid queries in Rails 4; Rails 5 raises ActiveRecord::IrreversibleOrderError instead.

Address-bar suggestions can outrank bookmarks and recent sites in Chrome; SHIFT + DEL removes unwanted entries, and a custom history search restores easier access to recent pages.

Quick reference for commonly used AngularJS features, useful when you need syntax and concepts at a glance.

Generate a one-time AWStats report from a single web log file by using a minimal config and disabling DNS lookups for faster output.

Malformed commit timestamps can make git clone fail with badTimezone when strict object validation is enabled. Disabling fetch.fsckobjects works around the error.

Free stock photos for personal and commercial use without attribution, with permission to modify images.

Activated gems can be checked through Gem.loaded_specs, and required libraries can be detected with defined? on a constant they define.

F12 on Ubuntu MATE can be reclaimed by stopping Tilda or disabling its autostart, preventing the drop-down terminal from intercepting the shortcut.

A library for testing a Ruby gem against multiple Ruby, dependency and database combinations, with shared local and CI setup for full permutation coverage.

mysql2 can fail to load libmysqlclient.so.20 after a broken install; reinstalling the gem usually restores the missing client library link.

Convert an RGBA color into the RGB equivalent for a chosen background when transparency must be removed. A Sass rgba-to-rgb() helper can compute the blend automatically.

VCR records each request only once, so replaying repeated identical calls can fail unless allow_playback_repeats is enabled.

localhost can resolve to ::1 on newer Linux systems, which may affect firewall rules that assume 127.0.0.1.

Gamma correction affects how colors are encoded and displayed, and sRGB defines a standard color space used by many systems.

Rails 5 migration classes are versioned with ActiveRecord::Migration[5.0] so the migration API can evolve without breaking historical files in db/migrate.

Useful browser add-ons for measuring page distances, inspecting Google Analytics events, and formatting JSON responses during debugging.

Failed bundle calls return different exit codes depending on the problem type, making shell-script error handling more precise.

Measure database time for a Ruby code block by collecting sql.active_record events and summing their durations with ActiveSupport::Notifications.

Run only modified or new Cucumber feature files from git status, reducing test time by avoiding unchanged specs.

Rendering helper output with content_tag can get clumsy; Haml::Engine lets helper methods build HTML fragments more readably, with access to other helpers and locals.

Side effects are necessary but make Ruby code harder to test and reason about; isolating them reduces coupling and keeps core logic predictable.