If Rails or Rake are complaining about a missing gem that is listed in your Gemfile.lock and the listed version...
Sometimes you want to use a vanilla Ruby method like a block. You can use Object#method to obtain a...
You can use this shell command: uniq -u input.txt output.txt
This article explains why some regular expressions take years to match against certain strings. A common culprit are nested repetition...
Sometimes you may need to figure out what branches exist on a remote repository so you can pull them down...
Good guide to different ways you can write CSS selectors that select elements by their attribute values.
features are pre-sold without any option to negotiate what’s important and what may be left out, you inevitably...
This will reduce the filesize of foo and bar to 0 bytes: truncate -s0 foo bar If the files do...
We are consistently having trouble with selenium-webdriver > 2.5.0 where whenever we try to select an option from a Capybara...
When you run rake db:create and get this error message Couldn't create database for {"encoding"=>"utf8", "username"=>"root...
Most likely you run rake and your code is causing an exception which is not the one shown in your...
whatsmydns.net is an online service that allows you to instantly perform a DNS lookup to check a hostnames current IP...
When installing your first formula, Homebrew may complain about not being able to access certain directories. The easiest solution to...
When your Solr seems to be started properly (a process is running with the correct data directory) but never responds...
When you put a Rake task into lib/tasks, but running it fails with... Don't know how to build task...
cURL makes a web request and shows you the response body. You can redirect the response body to /dev/null just...
Consider you have a website vhost listening to www.example.com, redirecting all incoming requests that do not talk about the configured...
ExecJS lets you run JavaScript code from Ruby. It automatically picks the best runtime available to evaluate your JavaScript program...
Here is a way to create a duplicate of one database, with all its tables and their data, under a...
If your application raises an error like ... Couldn't connect to the Solr server at http://127.0.0.1:8983/solr. 500 "Lock...
You can use fold: fold -sw 60 You can now paste your texts. fold will echo them back, word-wrapped...
In order to open a Nautilus window in your terminal's working directory, you can say: nautilus .
The state_machine gem comes with a rake task that lets you generate PNG graphs from any model using state...
If you get an error "Adress already in use" with autossh check with lsof or netstat if something already listen...