NW5 Manchester - Doris Siu - JS2 - Week1

1-exercises/A-accessing-values/exercise1.js

@@ -5,19 +5,19 @@
 */
 
 let dog = {
-  breed: "Dalmatian",
-  name: "Spot",
-  isHungry: true,
-  happiness: 6
+  breed: "Dalmatian", //string
+  name: "Spot", //string
+  isHungry: true, //boolean
+  happiness: 6 //number
 };
 
 /*
   You can access the values of each property using dot notation.
   Log the name and breed of this dog using dot notation.
 */
 
-let dogName; // complete the code
-let dogBreed; // complete the code
+let dogName = dog.name; // complete the code
+let dogBreed = dog.breed; // complete the code
 
 console.log(`${dogName} is a ${dogBreed}`);
 

1-exercises/A-accessing-values/exercise2.js

@@ -17,7 +17,7 @@ let capitalCities = {
 */
 
 let myCountry = "UnitedKingdom";
-let myCapitalCity; // complete the code
+let myCapitalCity = capitalCities["UnitedKingdom"]; // complete the code
 
 console.log(myCapitalCity);
 

1-exercises/A-accessing-values/exercise3.js

@@ -21,7 +21,9 @@ let basketballTeam = {
 */
 
 // write code here
+let topPlayersArr = basketballTeam.topPlayers.sort();
 
+topPlayersArr.forEach(player => console. log(player));
 
 /* EXPECTED RESULT
 

1-exercises/B-setting-values/exercise1.js

@@ -23,6 +23,11 @@ let capitalCities = {
 */
 
 // write code here
+capitalCities.UnitedKingdom.population = 8980000;
+capitalCities.China.population = 21500000;
+capitalCities.Peru = {};
+capitalCities.Peru.name = "Lima";
+capitalCities.Peru.population = 975000;
 
 console.log(capitalCities);
 

1-exercises/B-setting-values/exercise2.js

@@ -16,6 +16,11 @@ let student = {
 */
 
 // write code here
+student["attendence"] = 90;
+
+if (student["attendence"] >= 90 && student["examScore"] > 60) {
+  student["hasPassed"] = true;
+}
 
 /*
   - Write an "if" statement that changes the value of hasPassed to true

1-exercises/C-undefined-properties/exercise.js

@@ -16,6 +16,8 @@ let car = {
 
 console.log(car["colour"]);
 
+// Because there's no such a property named colour in the object car.
+
 // Example 2
 function sayHelloToUser(user) {
   console.log(`Hello ${user.firstName}`);
@@ -27,6 +29,8 @@ let user = {
 
 sayHelloToUser(user);
 
+// Because there's no such a property called firstName in the object user.
+
 // Example 3
 let myPet = {
   animal: "Cat",
@@ -36,3 +40,5 @@ let myPet = {
 };
 
 console.log(myPet.getName());
+
+// Because in the object method, it omits the keyword return for the string.

1-exercises/D-object-methods/exercise.js

@@ -9,6 +9,9 @@
 
 let student = {
   // write code here
+  getName : function (name) {
+    console.log("Student name: " + name);
+  }
 }
 
 student.getName("Daniel");

2-mandatory/1-recipes.js

@@ -22,4 +22,49 @@
   You should write and log at least 5 recipes
 */
 
-// write code here
+// write code here
+
+let chicken = {
+  title:"chicken",
+  serves:4,
+  ingredients: ["chicken","potatoes"]
+}
+
+let pork = {
+  title:"pork",
+  serves:4,
+  ingredients: ["pork","tomtoes"]
+}
+
+let steak = {
+  title:"steak",
+  serves:2,
+  ingredients: ["beef","pepper"]
+}
+
+let lamb = {
+  title:"lamb",
+  serves:3,
+  ingredients: ["lamb","garlic"]
+}
+
+let fish = {
+  title:"fish",
+  serves:6,
+  ingredients: ["fish","onion"]
+}
+console.log(Object.entries(fish));
+
+function printRecipe(obj) {
+  for ([key, value] of Object.entries(obj)) {
+    console.log(`${key}: ${value}`);
+  }
+}
+
+printRecipe(chicken);
+printRecipe(pork);
+printRecipe(steak);
+printRecipe(lamb);
+printRecipe(fish);
+
+

2-mandatory/2-currency-code-lookup.js

@@ -19,6 +19,11 @@ const COUNTRY_CURRENCY_CODES = [
 
 function createLookup(countryCurrencyCodes) {
   // write code here
+  let result = {};
+  for (let [country, currency] of countryCurrencyCodes) {
+    result[country] = currency;
+  }
+  return result;
 }
 
 /* ======= TESTS - DO NOT MODIFY =====

2-mandatory/3-shopping-list.js

@@ -20,6 +20,14 @@ let pantry = {
 
 function createShoppingList(recipe) {
   // write code here
+  let result = {};
+  result.name = recipe["name"];
+  let pantryArr = pantry.fridgeContents.concat(pantry.cupboardContents);
+  let missingArr = recipe["ingredients"].filter(
+    (food) => pantryArr.indexOf(food) === -1
+  );
+  result.items = missingArr;
+  return result;
 }
 
 /* ======= TESTS - DO NOT MODIFY =====
@@ -43,11 +51,18 @@ test("createShoppingList works for pancakes recipe", () => {
 test("createShoppingList works for margherita pizza recipe", () => {
   let recipe2 = {
     name: "margherita pizza",
-    ingredients: ["flour", "salt", "yeast", "tinned tomatoes", "oregano", "mozarella"],
+    ingredients: [
+      "flour",
+      "salt",
+      "yeast",
+      "tinned tomatoes",
+      "oregano",
+      "mozarella",
+    ],
   };
 
   expect(createShoppingList(recipe2)).toEqual({
     name: "margherita pizza",
-    items: ["flour", "yeast", "mozarella"]
+    items: ["flour", "yeast", "mozarella"],
   });
-});
+});

2-mandatory/4-restaurant.js

@@ -21,7 +21,24 @@ const MENU = {
 
 let cashRegister = {
   // write code here
-}
+  orderBurger: function (balance) {
+    if (balance >= MENU.burger) {
+      let newBalance = balance - MENU.burger;
+      return newBalance;
+    } else {
+      return balance;
+    }
+  },
+  orderFalafel: function (balance) {
+    if (balance >= MENU.falafel) {
+      let newBalance = balance - MENU.falafel;
+      return newBalance;
+    } else {
+      return balance;
+    }
+  },
+};
+
 
 /* ======= TESTS - DO NOT MODIFY =====
 - To run the tests for this exercise, run `npm test -- --testPathPattern 4-restaurant.js`

3-extra/1-count-words.js

@@ -25,10 +25,21 @@
 
 function countWords(string) {
   const wordCount = {};
-
+  if (!string || string.trim().length === 0) {
+    return wordCount;
+  }
+  let strArr = string.split(" ");
+  strArr.map((word) => {
+    if (wordCount[word] === undefined) {
+      wordCount[word] = 1;
+    } else {
+      wordCount[word] = wordCount[word] + 1;
+    }
+  });
   // write code here
 
   return wordCount;
+
 }
 
 /* ======= TESTS - DO NOT MODIFY =====
@@ -46,17 +57,25 @@ test("Code works for a small string", () => {
 });
 
 test("A string with, some punctuation", () => {
-  expect(countWords("A string with, some punctuation")).toEqual(
-    { A: 1, string: 1, "with,": 1, some: 1, punctuation: 1 }
-  );
+  expect(countWords("A string with, some punctuation")).toEqual({
+    A: 1,
+    string: 1,
+    "with,": 1,
+    some: 1,
+    punctuation: 1,
+  });
 });
 
 test("Empty string", () => {
   expect(countWords("")).toEqual({});
 });
 
 test("Example task string", () => {
-  expect(countWords("you're braver than you believe, stronger than you seem, and smarter than you think")).toEqual({
+  expect(
+    countWords(
+      "you're braver than you believe, stronger than you seem, and smarter than you think"
+    )
+  ).toEqual({
     "you're": 1,
     and: 1,
     "believe,": 1,