week 2 and 3 homework

.vscode/launch.json

@@ -0,0 +1,17 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Launch Program",
+            "skipFiles": [
+                "<node_internals>/**"
+            ],
+            "program": "${file}"
+        }
+    ]
+}

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;