kevinchisholm

// Example 1 - Using a for loop

var i = 0,
	records = ['foo', 'bar', 'baz'],
	arrayLength = records.length;

for (; i < arrayLength; i++) {
	console.log(`(${i}) The record is: ${records[i]}`);
}

kevinchisholm

// example # 1: check if the length property of the passed-in array is 0

function processRecords (records) {
    if (records.length === 0) {
        console.log(`No records to process`);
        return;
    }
  
    records.forEach(record => {
      console.log(`The record is: ${record}`);

kevinchisholm

//--------- PART 1 -------------------

const objectA = {
  foo: ['a', 'b', 'c']
};

const objectB = Object.assign({}, objectA);

console.dir(objectB); // {"foo":["a","b","c"]}

kevinchisholm

function validatePhoneForE164(phoneNumber) {
    const regEx = /^\+[1-9]\d{10,14}$/;

    return regEx.test(phoneNumber);
};

validatePhoneForE164('+12125551212'); // true
validatePhoneForE164('12125551212'); // false
validatePhoneForE164('2125551212'); // false
validatePhoneForE164('+1-212-555-1212'); // false

kevinchisholm

function validateEmailAddress(emailAddress) {
  const emailRegex = /[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}/;

  return emailRegex.test(emailAddress);
};

validateEmailAddress('[email protected]'); // true

validateEmailAddress('[email protected]'); // true

kevinchisholm

_.remove(this.rates, {
    id: resp.rate.id
});

_.remove(this.rates, rate => {
  return rate === resp.rate.id;
});

kevinchisholm

function sleep (milliseconds) {
  return new Promise(resolve => setTimeout(resolve, milliseconds));
};

function goToSleep (milliseconds) {
  console.log('Going to bed now...');

  await sleep (milliseconds);

  console.log('Finished sleeping!');

kevinchisholm

// example # 2: check if the length property of the passed-in array is "truthy"

function processRecords (records) {
    if (!records.length) {
        console.log(`No records to process`);
        return;
    }
  
    records.forEach(record => {
      console.log(`The record is: ${record}`);

kevinchisholm

// example # 3: If we pass-in an object with a lenght property, the code throws an error

function processRecords (records) {
    if (!records.length) {
        console.log(`No records to process`);
        return;
    }
  
    records.forEach(record => {
      console.log(`The record is: ${record}`);

kevinchisholm

// example # 4: Make sure that the passed-in object is an instance of the Array constructor

function processRecords (records) {
    if (!(records instanceof Array)) {
        console.log(`Array provided array not valid`);
        return;
    }

    if (!records.length) {
        console.log(`No records to process`);