West Midlands | 26-Jan-ITP | Fida H Ali Zada | Sprint 2 | coursework/sprint-2

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

@@ -1,5 +1,5 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> I think the variable 'str' is repeated twice in string literals.
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -9,5 +9,11 @@ function capitalise(str) {
   return str;
 }
 
-// =============> write your explanation here
+// =============> The error occurs because some parts of the code are not allowed in JS.
+//                The variable 'str' is already declared in line 7 as a parameter
 // =============> write your new code here
+
+function capitalise(str) {
+  return `${str[0].toUpperCase()}${str.slice(1)}`
+}
+console.log(capitalise("shop"));

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

@@ -1,7 +1,7 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// =============> variable 'decimalNumber' is repeated already declared as a parameter in line 8
 
 // Try playing computer with the example to work out what is going on
 
@@ -14,7 +14,12 @@ function convertToPercentage(decimalNumber) {
 
 console.log(decimalNumber);
 
-// =============> write your explanation here
+// =============> Again, the error is a syntax error.
+//                The variable 'decimal' is already declared as a parameter
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+  return `${decimalNumber * 100}%`
+}

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

@@ -3,18 +3,21 @@
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> The error occurs because we have not defined 'num'
 
 function square(3) {
     return num * num;
 }
 
-// =============> write the error message here
+// =============> It is a syntaxError: Enexpected number
 
-// =============> explain this error message here
+// =============> In line 8, the number as a parameter is not expected; instead, a variable is expected.
 
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
+function square(num) {
+    return num * num;
+}
 
 

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

@@ -1,14 +1,20 @@
 // Predict and explain first...
 
-// =============> write your prediction here
+// =============> In line 6, the word return is missing, I assume.
 
 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
+// =============> $`{multiply(10, 32)}` is undefined.
 
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+
+function multiply(a, b) {
+  return a * b;
+}
+
+console.log(multiply(10, 32));

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

@@ -1,5 +1,5 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> It will give an error; line 5 and 6 should be in one line.
 
 function sum(a, b) {
   return;
@@ -8,6 +8,12 @@ function sum(a, b) {
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
+// =============> The output is undefined because return and a + b are in two different lines.
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+
+function sum(a, b) {
+  return a + b;
+}
+
+console.log(sum(10, 32));

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

@@ -1,7 +1,7 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> It will probaby return the last digit as a string.
 
 const num = 103;
 
@@ -14,11 +14,21 @@ 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
+// =============> Aha, I was wrong. The outputs for all the console.log is 3
 // Explain why the output is the way it is
-// =============> write your explanation here
+// =============> because, the function takes 'const num = 103' as input.
 // Finally, correct the code to fix the problem
 // =============> write your new code here
 
+function getLastDigit(num) {
+  return num.toString().slice(-1);
+}
+
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem
+
+// This code should be working better. It takes the last digit of the number as a string
+// and at last, change that string into a number;
+function getLastDigit(num) {
+  return Number(num.toString().slice(-1));
+}

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) {
-    // return the BMI of someone based off their weight and height
-}
+    const bmi = weight / (height * height);
+    return Math.round(bmi * 10) / 10
+}
+
+// console.log(calculateBMI(68, 1.7));

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

@@ -14,3 +14,10 @@
 // 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 toUpperSnakeCase(str) {
+    return str.split(" ").map(item => item.toUpperCase()).join("_");
+}
+
+console.log(toUpperSnakeCase("lord of the rings"));
+// returns LORD_OF_THE_RINGS

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

@@ -4,3 +4,25 @@
 // 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
+
+// Method 1
+function toPounds(penceString) {
+    const penceStringWithoutP = penceString.substring(0, penceString.length - 1);
+    const paddedPenceNumberString = penceStringWithoutP.padStart(3, "0");
+    const pound = paddedPenceNumberString.substring(0, paddedPenceNumberString.length - 2); 
+    const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2); 
+
+    return `£${pound}.${pence}`;
+
+}
+console.log(toPounds("447p"));  // £4.47
+
+
+
+// Method 2
+function toPounds(penceString) {
+    const value = Number(penceString.slice(0, -1)) / 100;
+    return `£${value.toFixed(2)}`
+}
+
+console.log(toPounds("447p"));  // £4.47

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

@@ -11,24 +11,29 @@ 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() function 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
+// =============> 0
 
 // c) What is the return value of pad is called for the first time?
-// =============> write your answer here
+// =============> 00
 
 // 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
+// =============> 1
+//                the last pad, shows the remaining seconds (61 % 60 = 1), and it is 1.
 
 // 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
+// =============> 01
+//                The return value assigned to num when pad is called for the last time shows the seconds and it is 1

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

@@ -2,14 +2,32 @@
 // Make sure to do the prep before you do the coursework
 // Your task is to write tests for as many different groups of input data or edge cases as you can, and fix any bugs you find.
 
+// function formatAs12HourClock(time) {
+//   const hours = Number(time.slice(0, 2));
+//   if (hours > 12) {
+//     return `${hours - 12}:00 pm`;
+//   }
+//   return `${time} am`;
+// }
+
 function formatAs12HourClock(time) {
-  const hours = Number(time.slice(0, 2));
-  if (hours > 12) {
-    return `${hours - 12}:00 pm`;
-  }
-  return `${time} am`;
+  let hours = Number(time.slice(0, 2));
+  let minutes = Number(time.slice(3, 5));
+  let ampm = hours >= 12 ? 'pm' : 'am';
+  hours = hours % 12; 
+  hours = hours ? hours : 12; // the hour '0' should be '12'
+  minutes = minutes < 10 ? '0'+minutes : minutes;
+  hours = hours < 10 ? '0'+hours : hours;
+
+  return `${hours}:${minutes} ${ampm}`
 }
 
+console.log(formatAs12HourClock("00:00"));
+console.log(formatAs12HourClock("23:59"));
+console.log(formatAs12HourClock("12:00"));
+console.log(formatAs12HourClock("21:20"));
+
+
 const currentOutput = formatAs12HourClock("08:00");
 const targetOutput = "08:00 am";
 console.assert(