tarasowski

Using Callbacks

const posts = [
    { title: 'Post One', body: 'This is post one' },
    { title: 'Post Two', body: 'This is post two' }
]

const getPosts = () => {
    setTimeout(() => {
        let output = ''

tarasowski

1. The function after await someFunc() need to return a promise. Otherwise it will not await and exit from the function. The function below will simply exit and won't wait till the background process is finished. Since async functions are waiting for Promises. The keyword await makes JavaScript wait until that promise settles and returns its result.

const hello4 = () => setTimeout(() => console.log('Hello from Hello4'), 5000)

const asycFunc = async() => {
	await hello4()
    return
}

tarasowski

// This lambda function will not timeout during a 3sec, since all 3 background processes happening at the same time

const hello1 = () => {
    return new Promise(resolve => {
        setTimeout(() => resolve(console.log('Hello from Hello1')), 2000)
    })
}

const hello2 = () => {
    return new Promise(resolve => {

tarasowski

$ aws cognito-idp admin-create-user --user-pool-id eu-west-1_Ez3lS4Q8O --username [email protected] --user-attributes file://cognito-create-user.json

[
  {
    "Name": "name",
 "Value": "Dimitri"

tarasowski

let isVarAssigned = false

// if isVarAssigned is true, assign the value else assign 'There is no variable assigned' String
const x = isVarAssigned || 'There is no variable assigned'

console.log(x)

// if isVarAssigned is true go and assign the value 'Yes the variable is assigned' if false assign false
const y = isVarAssigned && 'Yes there is a variable assiged'

tarasowski

sam local invoke SaveContact -e ../../_mocks/lambda-payload-save-contact.json --template ../../../../template.yaml
sam local invoke SaveCompany -e ../../_mocks/lambda-payload-save-company.json --template ../../../../template.yaml
sam local invoke SaveDeal -e ../../_mocks/lambda-payload-save-deal.json --template ../../../../template.yaml
sam local invoke SaveActivity -e ../../_mocks/lambda-payload-save-activity.json --template ../../../../template.yaml

//stdin
echo '{"message": "Hey, are you there?" }' | sam local invoke "Ratings"

tarasowski

#!/bin/bash

## README
# To run this script
# => run `sudo bash cloud9-bootstrap.sh`

# Install node 8.10
nvm install 8.10
# Set node 8.10 as default
nvm alias default 8.10

tarasowski

aws dynamodb batch-write-item --request-items file://Destinations.json

tarasowski

aws dynamodb create-table --table-name AppSync-Destinations --attribute-definitions AttributeName=id,AttributeType=S --key-schema AttributeName=id,KeyType=HASH --provisioned-throughput ReadCapacityUnits=5,WriteCapacityUnits=5

tarasowski

'use strict'
const AWS = require('aws-sdk')
const gm = require('gm').subClass({ imageMagick: true})
const util = require('util')
const path = require('path')
const parse = require('./parse')
const s3 = new AWS.S3()

// constants
const WEB_WIDTH_MAX = 150