spalladino

# Backup
docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

# Restore
cat backup.sql | docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

chetan

YARD CHEATSHEET http://yardoc.org

May 2020 - updated fork: https://gist.github.com/phansch/db18a595d2f5f1ef16646af72fe1fb0e

cribbed from http://pastebin.com/xgzeAmBn

Templates to remind you of the options and formatting for the different types of objects you might want to document using YARD.

Modules

malarkey

When times get tough and people get nasty, you’ll need more than a killer smile. You’ll need a killer contract.

Used by 1000s of designers and developers Clarify what’s expected on both sides Helps build great relationships between you and your clients Plain and simple, no legal jargon Customisable to suit your business Used on countless web projects since 2008

…………………………

Ryanb58

>>> docker exec -it CONTAINERID /bin/sh
/app # telnet
/bin/sh: telnet: not found

/app # apk update
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gz
v3.7.0-243-gf26e75a186 [http://dl-cdn.alpinelinux.org/alpine/v3.7/main]
v3.7.0-229-g087f28e29d [http://dl-cdn.alpinelinux.org/alpine/v3.7/community]

tomas-stefano

Capybara Actions

# Anchor
click_link 'Save'

# Button
click_button 'awesome'

# Both above

didats

<select name="nationality">
  <option value="">-- select one --</option>
  <option value="afghan">Afghan</option>
  <option value="albanian">Albanian</option>
  <option value="algerian">Algerian</option>
  <option value="american">American</option>
  <option value="andorran">Andorran</option>
  <option value="angolan">Angolan</option>
  <option value="antiguans">Antiguans</option>
  <option value="argentinean">Argentinean</option>

slavikdev

Rails request path cheatsheet

Full path with query string

>>  request.url
=> "http://localhost:3000/ask-help.amp?hui=pizda"

Virtual path without query string

>>  request.path
=> "/ask-help.amp"

carlosramireziii

class AttachedValidator < ActiveModel::EachValidator
  def validate_each(record, attribute, value)
    record.errors.add(attribute, :attached, options) unless value.attached?
  end
end

moertel

# Temporarily redirects STDOUT and STDERR to /dev/null
# but does print exceptions should there occur any.
# Call as:
#   suppress_output { puts 'never printed' }
#
def suppress_output
  original_stderr = $stderr.clone
  original_stdout = $stdout.clone
  $stderr.reopen(File.new('/dev/null', 'w'))
  $stdout.reopen(File.new('/dev/null', 'w'))

satendra02

FROM ruby:2.3.1

# Install dependencies
RUN apt-get update -qq && apt-get install -y build-essential libpq-dev nodejs

# Set an environment variable where the Rails app is installed to inside of Docker image:
ENV RAILS_ROOT /var/www/app_name
RUN mkdir -p $RAILS_ROOT

# Set working directory, where the commands will be ran: