Arieg419

const bankStatement =
      name =>
        location =>
          balance =>
            `Hello ${name}! Welcome to the bank of ${location}. Your current balance is ${balance}`;

const statementExpectingLocation = bankStatement("Omer");
const statementExpectingBalance = statementExpectingLocation("NYC");
const bankStatementMsg = statementExpectingBalance("100 million"); // wishful thinking?

Arieg419

let a = 4;
let b = 5;
let c = 6;
const updateTwoVars = (a) => {
	b++;
	c = a * b;
}

updateTwoVars(a);
console.log(b,c); // b = 6, c = 24

Arieg419

let a = 4;
let b = 5;
let c = 6;
const updateTwoVars = (a, b, c) => [b++, a * b];

const updateRes = updateTwoVars(a,b,c);
b = updateRes[0]
c = updateRes[1]

Arieg419

const add = (x,y) => x + y;
const subtract = (x,y) => x - y;
const multiply = (x,y) => x * y;

const arrayOfFunctions = [add, subtract, multiply];

arrayOfFunctions.forEach(calculationFunction => console.log(calculationFunction(1,1))); // 2 0 1

Arieg419

const functionAsObjectProperty = {
    print: (value) => console.log(value)
};

functionAsObjectProperty.print("mic check"); // "mic check"

Arieg419

async function getUserToken(id) {
  const token = await getTokenFromServer(id);
  return token;
}

Arieg419

const addWrapper = () => (x,y) => x + y;

const add = addWrapper();

const sum1 = add (1,2); // 3

// Or we could do it like this

const sum2 = addWrapper()(4,4); // 8

Arieg419

const timeout = () => {
    setTimeout(() => alert("WoW"), 1000);
}

Arieg419

const jsonfile = require('jsonfile')
 
const file = '/tmp/data.json'
const obj = {name: 'JP'}
 
jsonfile.writeFile(file, obj, (err) => console.error(err))

Arieg419

const jsonfile = require('jsonfile')
 
const file = '/tmp/data.json'
const obj = {name: 'JP'}

const errorLoggerFunction = (err) => console.error(err);
 
jsonfile.writeFile(file, obj, errorLoggerFunction)