Find where a Ruby method is defined and inspect its implementation; Method#source_location reveals file and line, while method_source can return the method body.

telnet and nc cannot open SSL-secured TCP connections to remote services; openssl s_client can test the connection and handshake.

Lightweight canvas-based charting for web apps with high configurability and broad browser support. A permissive MIT-licensed alternative to Google Charts and commercial libraries.

Rails FlashHash comparisons ignore the internal used-entry state, so two flashes can look equal even when their next-request behavior differs.

Missing system libraries can break RVM Ruby installs, causing no such file to load -- openssl or zlib errors. Reinstalling the required dependencies and recompiling Ruby fixes the issue.

Print output often loses links, QR codes, and image quality. CSS print styles can add link URLs, better graphics, and browser preview support.

Create CSS gradients, borders, noise textures and box shadows visually, then copy ready-to-use CSS or SASS output.

CSS hacks can target specific browsers or browser versions to work around rendering bugs and compatibility issues without abandoning robust styles.

Touch-capable devices make it important to handle mouse and touch input together in web apps, including multi-touch browser events.

&:test works for private methods in Ruby 1.8 but raises NoMethodError in Ruby 1.9 and 2.0.

BigDecimal#floor returns different types in Ruby 1.8 and 1.9 because it depends on Float#floor; a backport restores the Ruby 1.9 behavior on Ruby 1.8.

Moving a Chrome or Chromium profile to a fresh system is possible by copying the local profile directory instead of creating an online account.

Ruby heredocs interpolate by default; single-quoted heredoc markers disable interpolation and keep backslash escapes literal.

Browsers often cache favicons too aggressively, so a site can show an outdated icon or one from another local project. Adding a version query string forces a fresh reload.

Load a compressed MySQL dump directly from a remote server over SSH with a progress bar, without copying or unpacking the file first.

Capistrano deployments can stall at a Username: prompt when Bundler fetches a gem from a broken GitHub :git URL and receives a 404.

Practical crash courses for founding a startup, raising funding, and testing ideas before building too much.

Test XPath queries directly in the browser console to inspect page elements without extra tools; Safari, Chrome, and Firefox support this in different ways.

Find the Ubuntu release codename or version from system files or lsb_release when you need the exact distribution name for troubleshooting or support.

SFLPhone can fail to launch when a stale PID file makes the daemon look already running; removing ~/.cache/sflphone/sfl.pid usually fixes it.

Firefox 22 blocks third-party cookies by default, limiting advertiser tracking across sites and giving visited websites control over cookie setting.

MongoMapper support for Rails 2.3.x on Ruby 1.9 via a forked gem branch; compatible with Ruby 1.8.7, REE, and Ruby 1.9.3.

Ruby 1.9 changes Module.const_defined? to search ancestors by default, so code checking constants can return different results than on Ruby 1.8.