Cape Town | 25-ITP-May | Asanda Dunn | Sprint 2 | Coursework/sprint2

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

@@ -1,13 +1,27 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// I don't think this will work because str is already an argument in the capitalise function 
+// so declaring it again is incorrect. Another thing is the variable str is being declared but the value assigned to 
+// it basically uses the str variable to interpolate the string
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
+
+
 function capitalise(str) {
   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
 
-// =============> write your explanation here
+// =============> write your explanation here// 
+// SyntaxError: Identifier 'str' has already been declared
+// this is happening because the str variable already exist as an argument in this function
 // =============> write your new code here
+
+function capitalize(str){
+  let car = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return car;  
+}
+capitalize("hello")
+console.log(capitalize("hello"))

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

@@ -5,16 +5,23 @@
 
 // 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
-
+// Prediction decimalNumber is already used as an argument so the variable name needs to be different 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+function ConvertToPercentage(decimalNumber){
+  // const decimalNum = 0.5;
+  const percentage = `${decimalNumber* 100}%`;
+  return percentage;
+}
+
+console.log(ConvertToPercentage(0.5))

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

@@ -1,6 +1,7 @@
 
 // Predict and explain first BEFORE you run any code...
-
+// It will probably not run because the value 2 is a fixed integer, your parameters / arguments get values 
+// assigned to them so you can't really reassign 2.
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
@@ -10,11 +11,14 @@ function square(3) {
 }
 
 // =============> write the error message here
-
+// SyntaxError: Unexpected number
 // =============> explain this error message here
-
+// This is a syntax error the number 2 cannot be used as a parameter since it cannot be reassigned.
 // 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 +1,21 @@
 // Predict and explain first...
 
 // =============> write your prediction here
-
+// This function is not returning anything
 function multiply(a, b) {
   console.log(a * b);
 }
 
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
 // =============> write your explanation here
-
+// This function is not returning anything. It does multiply the assigned values of a,b but it does not return the String with the 
+// as required on line 9
 // 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

@@ -1,6 +1,7 @@
 // Predict and explain first...
 //  =============> write your prediction here
-
+// this function does not return anything since the return statements has a semicolon before the command of what 
+// it has to actually return
 function sum(a, b) {
   return;
   a + b;
@@ -11,3 +12,8 @@ console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 // =============> write your explanation here
 // 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

@@ -1,5 +1,6 @@
 // Predict and explain first...
-
+// the variable num is declared outside of the function so it's a global variable 
+// and it is constant. It should be a parameter or an argument of the getLastDigit function
 // Predict the output of the following code:
 // =============> Write your prediction here
 
@@ -15,10 +16,18 @@ 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
+
+// the output is 3 for everything
 // Explain why the output is the way it is
+// firstly because num is constant and it is a global variable outside the function. The last digit on 103 remains 3. It does not change
 // =============> write your explanation here
 // Finally, correct the code to fix the problem
 // =============> write your new code here
-
+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)}`);
 // 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

@@ -15,5 +15,8 @@
 // It should return their Body Mass Index to 1 decimal place
 
 function calculateBMI(weight, height) {
+    let bmi = weight/(height *height)
+    return bmi.toFixed(1)
     // return the BMI of someone based off their weight and height
-}
+}
+console.log(calculateBMI(80 , 1.73))

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 upperSnakeCase(str) {
+  return str.toUpperCase().replaceAll(" ", "_");
+}
+console.log(upperSnakeCase("hello world in javascript"));

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

@@ -4,3 +4,27 @@
 // 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");
+
+    const result = `£${pounds}.${pence}`;
+return result
+}
+console.log(toPounds("399p"))

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

@@ -15,24 +15,34 @@ function formatTimeDisplay(seconds) {
   return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
 }
 
+console.log(formatTimeDisplay(61))
+
 // 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 3 times
 
 // 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
+// The value assigned to num when pad is called for the first 
+// time is 0 (the value of totalHours). 
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// The return value of pad when it is called for the first time is "00" 
+// because 0 is padded with a leading zero.
 
 // 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
+//The value assigned to num when pad is called for the 
+// last time is 1 (the value of remainingSeconds). 
+// This is because the return statement is executed from left to right, so the order of pad calls is: totalHours, remainingMinutes, and finally remainingSeconds.
+
+
 
 // e) What is the return value of pad when it is called for the last time in this program?  Explain your answer
-// =============> write your answer here
+//The return value of pad when it is called for the last time is "01" because 1 is padded with a leading zero.
+
+// The final output of formatTimeDisplay(61) will be "00:01:01".

Sprint-2/5-stretch-extend/format-time.js

@@ -23,3 +23,23 @@ console.assert(
   currentOutput2 === targetOutput2,
   `current output: ${currentOutput2}, target output: ${targetOutput2}`
 );
+const currentOutput3 = formatAs12HourClock("14:00");
+const targetOutput = "02:00 pm";
+console.assert(
+  currentOutput3 === targetOutput3,
+  `current output: ${currentOutput3}, target output: ${targetOutput3}`
+);
+
+const currentOutput4 = formatAsHourClock("00:00");
+const targetOutput4 = "12:00 am";
+console.assert(
+  currentOutput4 === targetOutput4,
+  `current output: ${currentOutput4}, target output: ${targetOutput4}`
+);
+
+const currentOutput5 = formatAsHourClock("17:00");
+const targetOutput5 = "05:00 pm";
+console.assert(
+  currentOutput5 === targetOutput5,
+  `currentOutput: ${currentOutput5}, target output: ${targetOutput5}`
+);