Promises - All Method

    // Promise.all()
    // when you only want to run your code after ALL
    // your promises are resolved.
    // EG: fetching remote data from multiple locations
    
    let p1 = () => Promise.resolve('Got the list of users');
    let p2 = () => Promise.resolve('Got the list of tweets');
    let p3 = Promise.resolve('Got the weather');
    
    Promise.all([p1(), p2(), p3]).then((resultsArr)=>{
        console.log( resultsArr[1] );            // returns result of Promise 2
        console.log( resultsArr[0] );            // returns result of Promise 1
        console.log( resultsArr[2] );            // returns result of Promise 3
    })