ZA | ITP May 25 | OBERT TILIMANDZI| MODULE-STRUCTURING AND TESTING DATA | SPRINT 2

Sprint-1/1-key-exercises/1-count.js

@@ -4,3 +4,4 @@ count = count + 1;
 
 // Line 1 is a variable declaration, creating the count variable with an initial value of 0
 // Describe what line 3 is doing, in particular focus on what = is doing
+// Answer: "count + 1" is a value being assigned to the variable count and "=" is the assignement operator used to assign values to a variable

Sprint-2/1-key-errors/0.js

@@ -1,13 +1,14 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> function looks good, this will capitalize first letter of the string
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
+// "str" variable was declared twice in the code we shall have to rename it
+
 function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
-  return str;
+  let strOne = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return strOne;
 }
 
-// =============> write your explanation here
-// =============> write your new code here
+console.log(capitalise("peter"));

Sprint-2/1-key-errors/1.js

@@ -1,20 +1,26 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// =============> this wont work as the variable was assigned to the argument name  
 
 // Try playing computer with the example to work out what is going on
 
-function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
-  const percentage = `${decimalNumber * 100}%`;
+// function convertToPercentage(decimalNumber) {
+//   const decimalNumber = 0.5;
+//   const percentage = `${decimalNumber * 100}%`;
 
-  return percentage;
-}
+//   return percentage;
+// }
 
-console.log(decimalNumber);
+// console.log(decimalNumber);
 
-// =============> write your explanation here
+// =============>'decimalNumber' was already declared so we need to remove it and get add the argument in the console rather
 
 // Finally, correct the code to fix the problem
-// =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+  return percentage;
+}
+
+console.log(convertToPercentage(0.7))

Sprint-2/1-key-errors/2.js

@@ -3,18 +3,22 @@
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> we will get an error message
 
-function square(3) {
-    return num * num;
-}
+// function square(3) {
+//     return num * num;
+// }
 
-// =============> write the error message here
+// =============> Unexpected number
 
-// =============> explain this error message here
+// =============> a number was used to name a parameter and also cannot start the name with a number moreover the retun was named different
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
 
 
+function square(num) {
+    return num * num;
+}
+console.log(square(3))

Sprint-2/2-mandatory-debug/0.js

@@ -1,14 +1,19 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> code will give us 2 results
 
-function multiply(a, b) {
-  console.log(a * b);
-}
+// function multiply(a, b) {
+//   console.log(a * b);
+// }
 
-console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+// console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
-// =============> write your explanation here
+// =============> we have duplicate console and missing return, so our function will only print and not execute
 
 // Finally, correct the code to fix the problem
-//  =============> write your new code here
+
+function multiply(a, b) {
+  return a * b;
+}
+
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);

Sprint-2/2-mandatory-debug/1.js

@@ -1,13 +1,18 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> will get a syntax error
 
-function sum(a, b) {
-  return;
-  a + b;
-}
+// function sum(a, b) {
+//   return;
+//   a + b;
+// }
 
-console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
+// console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
+// =============> the return statement is void and not connected with the expression
 // Finally, correct the code to fix the problem
-//  =============> write your new code here
+
+function sum(a, b) {
+  return a + b;
+}
+
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);

Sprint-2/2-mandatory-debug/2.js

@@ -1,24 +1,32 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> We will get an error since num is declared as a global variable
 
-const num = 103;
+// const num = 103;
 
-function getLastDigit() {
+// function getLastDigit() {
+//   return num.toString().slice(-1);
+// }
+
+// console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+// console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+// console.log(`The last digit of 806 is ${getLastDigit(806)}`);
+
+// Now run the code and compare the output to your prediction
+// =============> the code worked 
+// the function is only working using one variable 
+// =============> this function is not taking any arguments
+// Finally, correct the code to fix the problem
+
+function getLastDigit(num) {
   return num.toString().slice(-1);
 }
 
 console.log(`The last digit of 42 is ${getLastDigit(42)}`);
 console.log(`The last digit of 105 is ${getLastDigit(105)}`);
 console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
-// Now run the code and compare the output to your prediction
-// =============> write the output here
-// Explain why the output is the way it is
-// =============> write your explanation here
-// Finally, correct the code to fix the problem
-// =============> write your new code here
 
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem

Sprint-2/3-mandatory-implement/1-bmi.js

@@ -16,4 +16,13 @@
 
 function calculateBMI(weight, height) {
     // return the BMI of someone based off their weight and height
-}
+    // first square the height (height × height)
+    // divide the weight by that squared height value
+    // format the result to 1 decimal place
+
+    const heightInput = height * height;
+    const result = weight / heightInput;
+    return result.toFixed(1);
+
+}
+console.log(calculateBMI(101, 1.3))

Sprint-2/3-mandatory-implement/2-cases.js

@@ -14,3 +14,8 @@
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
+
+function allCapsNoSpace(textInput) {
+    return textInput.toUpperCase().replace(/ /g, '_');
+};
+console.log(allCapsNoSpace("take the spaces away from this line"));

Sprint-2/3-mandatory-implement/3-to-pounds.js

@@ -4,3 +4,22 @@
 // You will need to declare a function called toPounds with an appropriately named parameter.
 
 // You should call this function a number of times to check it works for different inputs
+
+function toPounds(penceString) {   
+
+    const penceStringWithoutTrailingP = penceString.substring(0, penceString.length - 1);
+    const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+
+    const pounds = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2);
+    const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0");
+
+    return `£${pounds}.${pence}`;
+};
+
+console.log(toPounds("18950p"));
+
+
+
+
+
+

Sprint-2/4-mandatory-interpret/time-format.js

@@ -1,34 +1,37 @@
-function pad(num) {
-  return num.toString().padStart(2, "0");
-}
+// function pad(num) {
+//   return num.toString().padStart(2, "0");
+// }
 
 function formatTimeDisplay(seconds) {
+    const pad = num => num.toString().padStart(2, "0");
   const remainingSeconds = seconds % 60;
+
   const totalMinutes = (seconds - remainingSeconds) / 60;
   const remainingMinutes = totalMinutes % 60;
-  const totalHours = (totalMinutes - remainingMinutes) / 60;
 
+  const totalHours = (totalMinutes - remainingMinutes) / 60;
   return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 }
+console.log(formatTimeDisplay("697541"))
 
 // You will need to play computer with this example - use the Python Visualiser https://pythontutor.com/visualize.html#mode=edit
 // to help you answer these questions
 
 // Questions
 
 // a) When formatTimeDisplay is called how many times will pad be called?
-// =============> write your answer here
+// =============> pad will be called three times, hours, minutes and seconds 
 
 // Call formatTimeDisplay with an input of 61, now answer the following:
 
 // b) What is the value assigned to num when pad is called for the first time?
-// =============> write your answer here
+// =============> 0, there are no hours
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// =============> 00 hours
 
 // d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> its 1 second
 
 // e) What is the return value assigned to num when pad is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+// =============> its 01 seconds

Sprint-3/1-key-implement/3-get-card-value.js

@@ -26,7 +26,7 @@ function assertEquals(actualOutput, targetOutput) {
 // When the function getCardValue is called with this card string as input,
 // Then it should return the numerical card value
 const aceofSpades = getCardValue("A♠");
-assertEquals(aceofSpades, 11);
+assertEquals(aceofSpades, '11');
 
 // Handle Number Cards (2-10):
 // Given a card with a rank between "2" and "9",