Jianzhong (Jacky) Chen

self-assessment-1.js

function convertTo(units, num) {
  //Do not worry about formatting your output to round to the nearest 2nd decimal number.
  if (units === 'cm') {
    return num * 2.54;
  } else if (unites === 'in') {
    return num / 2.54;
  }
}

//=================================================
var cityZBusSchedules = {
  bus12Schedule: [9, 18, 27, 36],
  bus15Schedule: [11, 22, 33, 44],
  bus22Schedule: [15, 30, 45]
};

function displayBusSchedule(cityZBusSchedules, busLine) {
  if (busLine === 'bus12Schedule') {
    console.log("The bus will arrive in the next " + cityZBusSchedules.bus12Schedule + " minutes.");
  } else if (busLine === 'bus15Schedule') {
    console.log("The bus will arrive in the next " + cityZBusSchedules.bus15Schedule + " minutes.");
  } else if (busLine === 'bus22Schedule') {
    console.log("The bus will arrive in the next " + cityZBusSchedules.bus22Schedule + " minutes.");
  }
}
displayBusSchedule(cityZBusSchedules, 'bus15Schedule');

//=============================================

function addGenre(song, genre) {
  song['genre'] = genre;
  return song;
}
var song = {title: "Countdown", artist: "Beyonce", durationInSeconds: 212};

var genre = 'Blues';

addGenre(song, 'Blues');

//==============================================

function executiveSummary(email) {
  if (email.length > 15) {
    return email.substring(0, 15);
  } else if (email.length <= 15) {
    return email;
  }
}

executiveSummary('URGreat!!!aaaaaaaaaaa');

//================================================

function removePartyKillers(playlist) {
  for (var i = 0; i < playlist.length; i++) {
    var songObj = playlist[i];
    if (songObj.durationInSeconds > 480) {
      delete(songObj);
    }
  }
  return playlist;
}

var awesomePlaylist = [
  {
    title: "Hay Day",
    artist: "Robo-Crop",
    durationInSeconds: 378
  }, {
    title: "10,000 Pounds",
    artist: "L-Ton Jonn",
    durationInSeconds: 498,
  }, {
    title: "Caesar's Salad",
    artist: "DJ Dinner Julius",
    durationInSeconds: 600,
  }, {
    title: "The British Are On Their Way",
    artist: "Raul Pevere",
    durationInSeconds: 1095,
  }, {
    title: "13th",
    artist: "The Doctors",
    durationInSeconds: 185,
  }
];

removePartyKillers(awesomePlaylist);

//=======================================

function onlyPayForHealthyThings(myCart) {
  var priceSum = 0;
  for (var i = 0; i < myCart.length; i++) {
    var obj = myCart[i];

    if (obj.nutritionalValue[lowSugar] === true && obj.nutritionalValue[lowSodium] === true) {
      priceSum += obj.price;
    }
  }
  return priceSum;
}

var myCart = [ 
  { name: 'chips',
    nutritionalValue: { lowSugar: true, lowSodium: false },
    price: 0.75 },
  { name: 'carrots',
    nutritionalValue: { lowSugar: true, lowSodium: true },
    price: 1.5 },
  { name: 'cookies',
    nutritionalValue: { lowSugar: false, lowSodium: true },
    price: 2.5 },
  { name: 'apples',
    nutritionalValue: { lowSugar: true, lowSodium: true },
    price: 0.6 },
  { name: 'soda',
    nutritionalValue: { lowSugar: false, lowSodium: true },
    price: 1.1 },
  { name: 'avocados',
    nutritionalValue: { lowSugar: true, lowSodium: true },
    price: 0.75 } 
  ];
  onlyPayForHealthyThings(myCart);