promise example

promise_example.js

const other = new Promise((resolve, reject) => {
  let values = [1,2, 3,4, 5];
  let sum = values.reduce((acc, next) => {
    return acc + next;
  }, 0)
  resolve(sum);
  reject('something went wrong');
});

let fullName = (first, last) => {
  return new Promise((resolve, reject) => {
    let fullName = `fullname is ${first} ${last}`;
    resolve(fullName);
    reject('ooops');
  })
}

let joey_smith = fullName('joey', 'smith');
joey_smith.then(data => console.log(data)).catch(err => err);