jrhorn424

Command Line Tricks

• !! Repeat Previous Command
• !-1 Repeat Previous Command
• !-2 Repeat 2nd Previous Command
• !ps Execute Previous Command STARTING WITH ps
• !^ First Argument From Previous Command
• !:2 2nd Argument From Previous Command
• !$ Last Argument From Previous Command
• !!:$ Last Argument From Previous Command

jrhorn424

require 'active_record'
require 'arel'

# Ruby-like syntax in AR conditions using the underlying Arel layer (Rails >= 3.0).
#
# What you would usually write like this: 
#
#   User.where(["users.created_at > ? AND users.name LIKE ?", Date.yesterday, "Mary"])
#
# can now be written like this:

jrhorn424

Commands examples

If the namespace is not used then the commands will perform on top of the default database. bundle exec rake db:create bundle exec rake db:migrate

By using the namespace we are going to use all the configuration for our alternate DB. bundle exec rake store:db:create bundle exec rake store:db:migrate

jrhorn424

messages = [nil, "Fizz", "Buzz", "FizzBuzz"]
acc = 810092048
(1..100).each do |i|
  c = acc & 3
  puts messages[c] || i
  acc = acc >> 2 | c << 28
end

# Explanation
#

jrhorn424

// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

jrhorn424

Keybase proof

I hereby claim:

• I am jrhorn424 on github.
• I am jrhorn (https://keybase.io/jrhorn) on keybase.
• I have a public key whose fingerprint is EA9D 4FC3 908C 7657 08BB 2A11 A2D2 72CF F38D B3A7

To claim this, I am signing this object:

jrhorn424

Number to Ordinal

See full kata at codewars

Finish the function numberToOrdinal, which should take a number and return it as a string with the correct ordinal indicator suffix (in English). That is:

• numberToOrdinal(1) ==> '1st'
• numberToOrdinal(2) ==> '2nd'
• numberToOrdinal(3) ==> '3rd'
• numberToOrdinal(4) ==> '4th'

jrhorn424

body {
  width: 100%;
  height: 500px;
  margin: 0;
  padding: 0;
  text-align: center;
}
body:before {
  display: inline-block;
  content: ' ';

jrhorn424

# lib/tasks/db.rake

# execute me with rake db:nuke_pave
namespace :db do
  desc "drops, creates, migrates, and seeds database"
  unless Rails.env == "Production"
    task :nuke_pave => %w(environment db:drop db:create db:migrate db:seed) do
      # If you have a sample file that creates data for you to play with locally:
      # Rake::Task["db:sample"].execute if Rails.env == "development"
      puts "Nuke and pave of #{Rails.env} complete."

jrhorn424

# Encapsulate the configuration DSL pattern.
# 
# Any `X=(value)` setter method on the given +obj+ is translated into `X(value)` method
# in the context of this object.
class ConfigDSL < BasicObject
  def initialize(obj, &config)
    @self = obj
    call(&config)
  end