mhmdAljefri

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

mhmdAljefri

Sending emails with ActionMailer and Sidekiq

Send email asynchroniously using Sidekiq.

ActionMailer

Create your mailer us usual:

mhmdAljefri

# instructio of first using postger


# OPEN CLI AS ROOT
sudo -u postgres psql
#command above open cli as super admin 

#CREATE USER
sudo -u postgres createuser <username>

mhmdAljefri

# Zsh

sudo apt install zsh

# If you have problem with adminstration folder
# remove lock folder from desk and cash follow next setps (optioal)
sudo rm /var/lib/apt/lists/lock
#remove from cash
sudo rm /var/cache/apt/archives/lock
sudo rm /var/lib/dpkg/lock

mhmdAljefri

import React from 'react'


const codeSplittingHoc = impoertComponent => 
  class componentName extends React.Component {
    state = {
      component: null // default state for component
    }
    async componentDidMount() {
      const { default: component } = await impoertComponent(); // import default from function and assign it to component

mhmdAljefri

#!/bin/sh

# ngix + required packages
sudo apt update
sudo apt upgrade -y
sudo apt install curl git-core nginx build-essential tcl8.5 -y
sudo apt install autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev zlib1g-dev libncurses5-dev libffi-dev libgdbm5 libgdbm-dev


# mysql

mhmdAljefri

function isSubset(array1, array2) {
  const filterdArray2Set = [...new Set(array2)]; // return uniq array

  let subset = false
  filterdArray2Set.forEach((item) => {
    subset = array1.includes(item)
 if (!subset) return;

mhmdAljefri

platform :ios, '9.0'
require_relative '../node_modules/@react-native-community/cli-platform-ios/native_modules'

def add_flipper_pods!(versions = {})
  versions['Flipper'] ||= '~> 0.33.1'
  versions['DoubleConversion'] ||= '1.1.7'
  versions['Flipper-Folly'] ||= '~> 2.1'
  versions['Flipper-Glog'] ||= '0.3.6'
  versions['Flipper-PeerTalk'] ||= '~> 0.0.4'
  versions['Flipper-RSocket'] ||= '~> 1.0'