lecture03-exercise-solutions.md

Exercise 1

const hello = function (callback) {
    callback();
}

hello(() => {console.log('Callback Called!');});

const hello = function (callback) {
    callback();
}

hello(function () {
    console.log('Callback Called!');
});

Exercise 2

const slowFunction = function () {
    setTimeout(() => {
        console.log('Slow');
    }, 500);
};

const fastFunction = function () {
    setTimeout(() => {
        console.log('Fast');
    }, 100);
};

slowFunction();

fastFunction();

Exercise 3

const fs = require('fs');

const readFile = function () {
    fs.readFile('textfile.txt', 'utf-8', (err, data) => {
        console.log(data);
        console.log('DONE READING FILE');
    });
}

readFile();

Exercise 4

let http = require('http');
let fs = require('fs');

let server = http.createServer(function (req, res) {
  fs.readFile('textfile.txt', 'utf-8', function(err, data) {
      res.write(data);
      res.end();
  })

});

server.listen(3000);
console.log('Server listening on port 3000...');