A frozen or garbled shell often recovers with Ctrl-Q after accidental Ctrl-S, or with reset when terminal output settings are corrupted.

Haml markup can be migrated to ERB with haml2erb, but the conversion is only partly automated and still needs manual cleanup.

.notice,
.error,
.information,
.warning {
    font-weight: bold;
}

.notice {
    color: #11bb00;
}

.error {
    color: #F53A31;
}

.information {
    color: #557;
}

.warning {
    color: #d07d2d;
}

rake -T

This starts delayed_job, hiding all the output and hiding the process in the background.

rake jobs:work &>/dev/null &

sudo gem install zip
git clone git://github.com/rtomayko/date-performance.git
cd date-performance
rake package:build
cd dist
sudo gem install --no-ri --no-rdoc date-performance-0.4.7.gem

ActsAsSolr::Post.execute(Solr::Request::Delete.new(:query => "#{Location.solr_configuration[:type_field]}:#{ModelClass}"))
ActsAsSolr::Post.execute(Solr::Request::Commit.new)

Solr listens to different ports for different environments.

Start Solr (and hide useless output)

rake solr:start PORT=8981 &>/dev/null
rake solr:start PORT=8982 &>/dev/null

Stop Solr

rake solr:stop PORT=8981
rake solr:stop PORT=8982

Run one Cucumber feature file directly with script/cucumber, or invoke it through rake when speed is less important.

Speed up gem installs by skipping RI and RDoc generation with gem install --no-document; a global ~/.gemrc setting can disable local documentation support.

To call a class method (or static method) from an instance method:

class.method()

To call a class method from a class method:

method()

Development error from mixing non-reloading code with autoloaded classes, often after a stale class reference or cached instance keeps an unloaded constant alive.

sudo gem install rails --version="=1.2.3"
rails _1.2.3_ new-project-folder

sudo apt-get install unzip
rake rails:freeze:edge RELEASE=2.2.2

Display the active Git branch directly in the Bash prompt by customizing PS1, so the current repository state is visible while working in the shell.

Run one Test::Unit file, method, or name-matching subset directly from the command line when a full test suite is unnecessary.

Common ignore list for source control that keeps logs, temporary files, local databases, IDE settings, and generated assets out of git history.

Check out a remote branch locally and set up tracking so future pulls and pushes stay linked to origin.

Quick Git commands for former Subversion users who need to clone, stage, commit, push, pull, branch, stash, and restore files.

jqueryElement.is(':checked')

ALT input in a VirtualBox Windows VM can feel locked on Ubuntu. Workarounds let the Windows key act as ALT or change key mapping.

Callback order in state_machine matters when transitions depend on validation and persistence; aborting the chain can stop a transition from completing.

SSH or Capistrano connections can fail when ssh-agent offers too many keys and servers stop after repeated authentication attempts.