MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

lfender6445

Pry Cheat Sheet

• Youtube Tutorial 2013

Command Line

• pry -r ./config/app_init_file.rb - load your app into a pry session (look at the file loaded by config.ru)
• pry -r ./config/environment.rb - load your rails into a pry session

Debugger

pierrejoubert73

How to add a collapsible section in markdown

1. Example

Click me

Heading

1. Foo
2. Bar
   • Baz

• Qux

fardjad

How to Install Homebrew on Manjaro

Fardjad Davari
Published on GitHub Gist

speric

Chapter 1 - Object Oriented Design

The purpose of design is to allow you to do design later, and it's primary goal is to reduce the cost of change.

SOLID Design:

• Single Responsibility Principle: a class should have only a single responsibility
• Open-Closed Principle: Software entities should be open for extension, but closed for modification (inherit instead of modifying existing classes).
• Liskov Substitution: Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.
• Interface Segregation: Many client-specific interfaces are better than one general-purpose interface.

dalegaspi

Homebrew and Symlink Issues

if you see this:

Error: An unexpected error occurred during the `brew link` step
The formula built, but is not symlinked into /usr/local
Permission denied @ dir_s_mkdir - /usr/local/Frameworks
Error: Permission denied @ dir_s_mkdir - /usr/local/Frameworks

tonymtz

# first:
lsbom -f -l -s -pf /var/db/receipts/org.nodejs.pkg.bom | while read f; do  sudo rm /usr/local/${f}; done
sudo rm -rf /usr/local/lib/node /usr/local/lib/node_modules /var/db/receipts/org.nodejs.*

# To recap, the best way (I've found) to completely uninstall node + npm is to do the following:

# go to /usr/local/lib and delete any node and node_modules
cd /usr/local/lib
sudo rm -rf node*

rstacruz

Rails Models

Generating models

$ rails g model User

Associations

belongs_to

has_one

mfilej

# http://stackoverflow.com/questions/5108876/kill-a-postgresql-session-connection
namespace :db do 
  desc "Fix 'database is being accessed by other users'"
  task :terminate => :environment do
    ActiveRecord::Base.connection.execute <<-SQL
      SELECT 
        pg_terminate_backend(pid) 
      FROM 
        pg_stat_activity 
      WHERE 

GregPK

class FileUploadComponent extends Component{
  upload(){
    this.props.mutate({
      variables: {
        id,
        avatar: this.inputFile.files[0] //this is how you send file
      }
    }).
    then(({data}) => {
      console.log(data)