JavaScript Promises

gistfile1.txt

#!/usr/bin/env node

(() => {

function makeHttpRequests() {
  let newCount = 0;
  let a = new Promise((resolve) => {
    setTimeout(function() {
      resolve(newCount += 1);
    }, Math.floor(Math.random() * 10) * 2000);
  });

  let b = new Promise((resolve) => {
    setTimeout(function() {
      resolve(newCount += 1);
    }, Math.floor(Math.random() * 10) * 2000);
  });

  let c = new Promise((resolve) => {
    setTimeout(function() {
      resolve(newCount += 1);
    }, Math.floor(Math.random() * 10) * 2000);
  });

  return Promise.all([a, b, c]).then((results) => {
    newCount = results.length;
    console.log(results);
    console.log("*** New Count: ", newCount);
    console.log("***************************");
    return results;
  });
}

console.log("1. visit web page\n");

function getPersonName(personId) {
  return makeHttpRequests().then((results) => {
    let person = { id: results.length, name: "Fern" };
    console.log("------------------------------")
    console.log("0. The Http Results: ", results.length);
    console.log("------------------------------")
    return [person, results]
  }).then(([person, results]) => {
    newCount = results.length;
    newCount += 1;
    return [person, newCount, "new results to send"];
  }).then(([person, newCount, message]) => {
    console.log("------------------------------")
    console.log("1. Person id: ", person.id);
    console.log("1. Person object:", person);
    console.log("------------------------------");
    return person;
  }).then(({ name }) => {
    console.log("------------------------------");
    console.log("2. The person name is: ", name);
    console.log("------------------------------");
    return name;
  }).then((name) => {
    console.log("------------------------------");
    console.log("3. The Name is: ", name);
    console.log("------------------------------");
    return [personId, name];
  });
}

const person_id = 1000;

getPersonName(person_id).then(([personId, personName]) => {
    console.log("------------------------------");
    console.log("4. getPersonName Id:", personId);
    console.log("4. getPersonName Name", personName);
    console.log("------------------------------");
});

})();