Gaafar

const bb = require('bluebird');
const axios = require('axios');
const f = require('lodash/fp');
const autheader = 'token xxx';

const fetch = (page, continuePredicate, accumulator = [] ) =>
    axios.get('https://api.github.com/orgs/:org/repos', {
        params: {
            page,
            per_page: 100

Gaafar

const makeRequest = () => {
  return promise1()
    .then(value1 => {
      // do something
      return Promise.all([value1, promise2(value1)])
    })
    .then(([value1, value2]) => {
      // do something          
      return promise3(value1, value2)
    })

Gaafar

const makeRequest = async () => {
  await callAPromise()
  await callAPromise()
  await callAPromise()
  await callAPromise()
  await callAPromise()
  throw new Error("oops");
}

makeRequest()

Gaafar

// this will not work in top level
// await makeRequest()

// this will work
makeRequest().then((result) => {
  // do something
})

Gaafar

const makeRequest = async () => {
  const value1 = await promise1()
  const value2 = await promise2(value1)
  return promise3(value1, value2)
}

Gaafar

# install zsh
sudo apt-get update
sudo apt-get install zsh git -y
sh -c "$(curl -fsSL https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"
chsh -s $(which zsh)
# manual: edit theme in ~/.zshrc to "clean"

# ssh-key
ssh-keygen -t rsa

Gaafar

Motivation

Easy access for a property in higher order functions, enables composition & piping

Examples

const strings = ["", "a"]
const filteredStrings = strings.filter(.length) // ["a"]

Gaafar

# cron tab
# 0 0 */5 * * /root/certbot-renew

#!/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
#old /root/certbot-auto renew
certbot renew

# don't forget chmod +x /root/certbot-renew

Gaafar

function add (x, y) {return x+y}

let curry = (f, ...args) => f.bind.apply(f,[null, ...args])

let add4 = curry(add,4)
console.log(add4(5)) //9

let add4n6 = curry(add4,6)
console.log(add4n6()) //10

Gaafar

const makeRequest = () => {
  return callAPromise()
    .then(() => callAPromise())
    .then(() => callAPromise())
    .then(() => callAPromise())
    .then(() => callAPromise())
    .then(() => {
      throw new Error("oops");
    })
}