Week4 homework

week-1/Homework/extra/1-currency-conversion.js

@@ -5,18 +5,21 @@
   Write a function that converts a price to USD (exchange rate is 1.4 $ to £)
 */
 
-function convertToUSD() {}
+function convertToUSD(pricePound) {
+  return pricePound * 1.4;
+}
 
 /*
-  CURRENCY FORMATTING
   ===================
   The business is now breaking into the Brazilian market
   Write a new function for converting to the Brazilian real (exchange rate is 5.7 BRL to £)
   They have also decided that they should add a 1% fee to all foreign transactions
   Find a way to add 1% to all currency conversions (think about the DRY principle)
 */
 
-function convertToBRL() {}
+function convertToBRL(pricePound) {
+  return (pricePound * 1.01) * 5.7;
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

week-1/Homework/extra/2-piping.js

@@ -16,26 +16,33 @@
   the final result to the variable goodCode
 */
 
-function add() {
 
-}
 
-function multiply() {
+function add(a, b) {
+  const sum = Math.round((a + b) * 10) / 10;
+  return sum;
+}
 
+function multiply(a, b) {
+  return a * b;
 }
 
-function format() {
+function format(a) {
+  return "£" + a;
 
 }
 
 const startingValue = 2
 
 // Why can this code be seen as bad practice? Comment your answer.
-let badCode = 
+let badCode = format(multiply(add(startingValue, 10), 2));
 
 /* BETTER PRACTICE */
 
-let goodCode = 
+addValue = add(startingValue, 10);
+multiplyValue = multiply(addValue, 2);
+
+let goodCode = format(multiplyValue);
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

week-1/Homework/mandatory/1-syntax-errors.js

@@ -1,17 +1,19 @@
 // There are syntax errors in this code - can you fix it to pass the tests?
 
-function addNumbers(a b c) {
+function addNumbers(a, b, c) {
     return a + b + c;
 }
 
-function introduceMe(name, age)
-return "Hello, my name is " + name "and I am " age + "years old";
+function introduceMe(name, age) {
+    return "Hello, my name is " + name + " and I am " + age + " years old";
+}
 
 function getRemainder(a, b) {
-    remainder = a %% b;
+    remainder = a % b;
+
 
     // Use string interpolation here
-    return "The remainder is %{remainder}"
+    return `The remainder is ${remainder}`;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

week-1/Homework/mandatory/2-logic-error.js

@@ -1,16 +1,15 @@
 // The syntax for this function is valid but it has an error, find it and fix it.
 
 function trimWord(word) {
-  return wordtrim();
+  return word.trim();
 }
 
 function getWordLength(word) {
-  return "word".length()
+  return word.length;
 }
 
 function multiply(a, b, c) {
-  a * b * c;
-  return;
+  return a * b * c;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

week-1/Homework/mandatory/3-function-output.js

@@ -1,16 +1,19 @@
 // Add comments to explain what this function does. You're meant to use Google!
+//Takes a random number between 0 (included) and 1 (excluded) and multiply it on 10
 function getNumber() {
     return Math.random() * 10;
 }
 
 // Add comments to explain what this function does. You're meant to use Google!
+//concatenates the string arguments to the calling string and returns a new string.
 function s(w1, w2) {
     return w1.concat(w2);
 }
 
 function concatenate(firstWord, secondWord, thirdWord) {
     // Write the body of this function to concatenate three words together
     // Look at the test case below to understand what to expect in return 
+    return `${firstWord} ${secondWord} ${thirdWord}`
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

week-1/Homework/mandatory/4-tax.js

@@ -5,7 +5,9 @@
   Sales tax is 20% of the price of the product
 */
 
-function calculateSalesTax() {}
+function calculateSalesTax(amount) {
+  return amount * 1.2;
+}
 
 /*
   CURRENCY FORMATTING
@@ -17,7 +19,11 @@ function calculateSalesTax() {}
   Remember that the prices must include the sales tax (hint: you already wrote a function for this!)
 */
 
-function formatCurrency() {}
+function formatCurrency(amount) {
+  const price = calculateSalesTax(amount);
+  return "£" + price.toFixed(2);
+}
+
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

week-1/Homework/mandatory/5-magic-8-ball.js

@@ -45,7 +45,20 @@ Very doubtful.
 
 // This should log "The ball has shaken!"
 // and return the answer.
-function shakeBall() {}
+function shakeBall(question) {
+  console.log("The ball has shaken!");
+  const array1 = ["It is certain.", "It is decidedly so.",
+  "Without a doubt.", "Yes - definitely.", "You may rely on it.",
+  "As I see it, yes.", "Most likely.", "Outlook good.", "Yes.", 
+  "Signs point to yes.", "Reply hazy, try again.", "Ask again later.", 
+  "Better not tell you now.", "Cannot predict now.", "Concentrate and ask again.", 
+  "Don't count on it.", "My reply is no.", "My sources say no.", 
+  "Outlook not so good.", "Very doubtful."];
+  let answer = array1[Math.floor(Math.random() * array1.length)];
+  return answer;
+}
+
+
 
 // The answer should come from shaking the ball
 let answer;
@@ -55,7 +68,25 @@ let answer;
 // - positive
 // - negative
 // - very negative
-function checkAnswer() {}
+function checkAnswer(answer) {
+  const arr1 = ["It is certain.", "It is decidedly so.",
+  "Without a doubt.", "Yes - definitely.", "You may rely on it."];
+  const arr2 = ["As I see it, yes.", "Most likely.", "Outlook good.", "Yes.", 
+  "Signs point to yes."];
+  const arr3 = ["Reply hazy, try again.", "Ask again later.", 
+  "Better not tell you now.", "Cannot predict now.", "Concentrate and ask again."];
+  const arr4 = ["Don't count on it.", "My reply is no.", "My sources say no.", 
+  "Outlook not so good.", "Very doubtful."];
+  if (arr1.includes(answer)) {
+    return "very positive";
+  } else if (arr2.includes(answer)) {
+    return "positive";
+  } else if (arr3.includes(answer)) {
+    return "negative";
+  } else if (arr4.includes(answer)) {
+    return "very negative";
+  }
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 const log = console.log;

week-2/.archive/mandatory/1-fix-functions.js

@@ -2,7 +2,7 @@
 // Look at the tests and see how you can fix them.
 
 function mood() {
-  let isHappy = true;
+  let isHappy = false;
 
   if (isHappy) {
     return "I am happy";
@@ -13,7 +13,7 @@ function mood() {
 
 function greaterThan10() {
   let num = 10;
-  let isBigEnough;
+  let isBigEnough = num >= 10;
 
   if (isBigEnough) {
     return "num is greater than or equal to 10";
@@ -24,21 +24,21 @@ function greaterThan10() {
 
 function sortArray() {
   let letters = ["a", "n", "c", "e", "z", "f"];
-  let sortedLetters;
+  let sortedLetters = letters.sort();
 
   return sortedLetters;
 }
 
 function first5() {
   let numbers = [1, 2, 3, 4, 5, 6, 7, 8];
-  let sliced;
+  let sliced = numbers.slice(0, 5);
 
   return sliced;
 }
 
 function get3rdIndex(arr) {
   let index = 3;
-  let element;
+  let element = arr[index];
 
   return element;
 }

week-2/.archive/mandatory/2-function-creation.js

@@ -5,7 +5,12 @@ Write a function that:
 - removes any forward slashes (/) in the strings
 - makes the string all lowercase
 */
-function tidyUpString(strArr) {}
+
+function tidyUpString(strArr) {
+  return newTidyStr = strArr.map(function (el) {
+    return el.trim().replace("/", "").toLowerCase();
+  });
+}
 
 /*
 Complete the function to check if the variable `num` satisfies the following requirements:
@@ -15,7 +20,12 @@ Complete the function to check if the variable `num` satisfies the following req
 Tip: use logical operators
 */
 
-function validate(num) {}
+function validate(num) {
+  if (typeof num === "number" && num % 2 === 0 && num <= 100) {
+    return true;
+  }
+  return false;
+}
 
 /* 
 Write a function that removes an element from an array
@@ -26,8 +36,10 @@ The function must:
 */
 
 function remove(arr, index) {
-  return; // complete this statement
+  arr.splice(index, 1);
+  return arr;
 }
+//return; // complete this statement
 
 /*
 Write a function that:
@@ -38,7 +50,12 @@ Write a function that:
 */
 
 function formatPercentage(arr) {
-
+  for (let i = 0; i < arr.length; i++) {
+    arr[i] = arr[i].toPrecision(2);
+    if (arr[i] > 100) arr[i] = 100;
+    arr[i] = arr[i] + "%";
+  }
+  return arr;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
@@ -72,7 +89,7 @@ test(
     "daniel",
     "irina",
     "gordon",
-    "ashleigh"
+    "ashleigh",
   ])
 );
 test(
@@ -101,7 +118,7 @@ test(
     "c",
     "d",
     "e",
-    "f"
+    "f",
   ])
 );
 
@@ -111,6 +128,6 @@ test(
     "23%",
     "18%",
     "100%",
-    "0.37%"
+    "0.37%",
   ])
-);
+);

week-2/.archive/mandatory/3-playing-computer.js

@@ -28,7 +28,7 @@ const f2 = function(a, b) {
 
 console.log(x);
 console.log(a);
-console.log(b);
+//console.log(b);
 
 for (let i = 0; i < 5; ++i) {
   a = a + 1;

week-2/.archive/mandatory/4-sorting-algorithm.js

@@ -14,7 +14,19 @@ You don't have to worry about making this algorithm work fast! The idea is to ge
 "think" like a computer and practice your knowledge of basic JavaScript.
 */
 
-function sortAges(arr) {}
+function sortAges(arr) {
+  var len = arr.length;
+  for (var i = len - 1; i >= 0; i--) {
+    for (var j = 1; j <= i; j++) {
+      if (arr[j - 1] > arr[j]) {
+        var temp = arr[j - 1];
+        arr[j - 1] = arr[j];
+        arr[j] = temp;
+      }
+    }
+  }
+  return arr;
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

week-4/Homework/mandatory/1-food.js

@@ -17,6 +17,7 @@ console.log("Favorite food is " + myFavFood.name);
 // and returns the address of where to buy it
 
 function getTakeAwayAddress(food) {
+  return food.takeAway.address;
   // write code here
 }
 
@@ -26,22 +27,29 @@ console.log("I can buy my favorite food from " + getTakeAwayAddress(myFavFood));
 // and returns true if it's vegetarian, or false if not
 
 function isVeggie(food) {
+  return food.isVeggie;
   // write code here
 }
 
-console.log("Is my favorite vegetarian? " + isVeggie(food));
+console.log("Is my favorite vegetarian? " + isVeggie(myFavFood));
 
 // 3. Declare a function "isLowCalorie" that accepts "food" as a parameter
 // and returns true if it has less than 600 calories, or false otherwise
 // write your own console.log() that calls the function to test it, as in the examples above!
 // no example code is provided here!
 
+function isLowCalorie(food) {
+  return food.caloriesPerPortion < 600;
+};
+
+console.log("Is the food low calorie? " + isLowCalorie(myFavFood));
 //---------------------------------------
 
 // 3. Declare a function "isSafeForNutAllergies" that accepts "food" as a parameter
 // and returns false if it found the word "sesame" in the ingredients, or true otherwise
 
 function isSafeForNutAllergies(food) {
+  return !food.ingredients.includes("sesame seeds");
   //write code here
 }