Manchester | 25-ITP-Sep | Hani Sadah| Sprint 2 | Coursework/sprint 2

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

@@ -1,13 +1,22 @@
+
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> I predict that we will not need to write let in line 8 as str is already declared
+// as an argument within the function captialise.
 
 // 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;
+// }
+
+// capitalise ('hello');
+//==============> A syntaxError occurred as 'str' is being cleared.
+
+
 function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
   return str;
 }
-
-// =============> write your explanation here
-// =============> write your new code here
+console.log (capitalise ('hello'));

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

@@ -1,20 +1,33 @@
+
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
+// =============> I believe that the function convertToPercentage is not mentioned in the console.log statement.
+// Declaring the const decimalNumber is unnecessary as it is already declared as a parameter within the function convertToPercentage.
 
 // Try playing computer with the example to work out what is going on
 
-function convertToPercentage(decimalNumber) {
+// function convertToPercentage(decimalNumber) {
+  // const decimalNumber = 0.5;
+  // const percentage = `${decimalNumber * 100}%`;
+
+  // return percentage;
+//}
+
+// console.log(decimalNumber);
+
+// =============> A syntaxError occurred saying decimalNumber is already declared.
+
+// Finally, correct the code to fix the problem
+// =============> write your new code here
+
+function convertToPercentage() {
   const decimalNumber = 0.5;
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
 
-console.log(decimalNumber);
-
-// =============> write your explanation here
+console.log(convertToPercentage());
 
-// Finally, correct the code to fix the problem
-// =============> write your new code here
+// the new code runs without error and outputs "50%"

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

@@ -1,20 +1,26 @@
 
+
 // Predict and explain first BEFORE you run any code...
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> The num parameter should be mentioned inside the function square instead of the number 3.
+// then it should be called as square (3) in the console.log statement.
 
-function square(3) {
-    return num * num;
-}
+//function square(3) {
+//return num * num;
+//}
+
+// =============> function square(3) syntaxError: Unexpected number.
+// =============> 3 wasn't expected... instead a declaration like 'num' was expected.
 
-// =============> write the error message here
 
-// =============> explain this error message here
 
 // 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
+// =============> In line 6, instead of console.log printing the result of multiply(10, 32), return a*b would be better
+//because the console.log would only print a*b.
 
-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
+// =============> After running the code, we got 'the result of multiplying 10 and 32 is undefined'
+// as the multiply parameters weren't considered as parameters inside the function multiply.
 
 // 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 +1,13 @@
 // Predict and explain first...
-//  =============> write your prediction here
+//  =============> SyntaxError will occur due to putting a semicolon after return.
 
 function sum(a, b) {
-  return;
-  a + b;
+  return a + b;
 }
 
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
-// =============> write your explanation here
+// =============> unlike the expectation that the code runs without error as 'the sum of 10 and 32 is undefined'.
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+// we needed just to remove the semicolon after return statement and to bring up the a+b expression side by side with return.

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

@@ -1,24 +1,34 @@
 // Predict and explain first...
 
 // Predict the output of the following code:
-// =============> Write your prediction here
+// =============> The code will return 3 as a string first, but after calling the getLastDigit function,
+// it will not return anything because every number based will be converted to string.
 
-const num = 103;
+//const num = 103;
 
-function getLastDigit() {
-  return num.toString().slice(-1);
-}
+//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)}`);
+//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
+// =============> The last digit of 42 is 3 three times.
+// the prediction was close but not accurate, the case is that the parameter num needs to be 
+//the function instead of const num = 103.
+// =============> 
 // 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
+// parameter num needs to be with the getLastDigit function instead of const num=103.

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) {
+    const bmi = weight / (weight*height);
+    return bmi.toFixed(1);
     // return the BMI of someone based off their weight and height
-}
+}
+console.log("the BMI is", calculateBMI(70, 1.73));

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

@@ -1,3 +1,4 @@
+
 // A set of words can be grouped together in different cases.
 
 // For example, "hello there" in snake case would be written "hello_there"
@@ -14,3 +15,15 @@
 // 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 capSnakeCase(str) {
+    const upper = str.toUpperCase();
+    const snake = upper.replace(/ /g, "_");
+    return snake;
+}
+console.log(capSnakeCase("lord of the rings"));
+
+// step 1: get a string input
+//step 2: change the upper case
+//step 3: replace spaces with underscores
+// step 4: return capSnakeCase

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

@@ -4,3 +4,15 @@
 // 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("399p"))
+console.log(toPounds("5p"))
+console.log(toPounds("5678p"))

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

@@ -1,3 +1,4 @@
+
 function pad(num) {
   return num.toString().padStart(2, "0");
 }
@@ -10,25 +11,25 @@ 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
+// =============> It 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
+// =============> The leftover second is assigned to num as remainingSEconds 61%60
 
 // 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 remainingSeconds from passed from pad to num is changed to string and padded as 01

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

@@ -1,3 +1,4 @@
+
 // This is the latest solution to the problem from the prep.
 // 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.
@@ -23,3 +24,57 @@ console.assert(
   currentOutput2 === targetOutput2,
   `current output: ${currentOutput2}, target output: ${targetOutput2}`
 );
+
+const currentOutput3 = formatAs12HourClock("00:00");
+const targetOutput3 = "12:00 am";
+console.assert(
+  currentOutput3 === targetOutput3,
+  `current output: ${currentOutput3}, target output: ${targetOutput3}`
+);
+
+const currentOutput4 = formatAs12HourClock("12:00");
+const targetOutput4 = "12:00 pm";
+console.assert(
+  currentOutput4 === targetOutput4,
+  `current output: ${currentOutput4}, target output: ${targetOutput4}`
+);
+
+const currentOutput5 = formatAs12HourClock("13:00");
+const targetOutput5 = "1:00 pm";
+console.assert(
+  currentOutput5 === targetOutput5,
+  `current output: ${currentOutput5}, target output: ${targetOutput5}`
+);
+
+const currentOutput7 = formatAs12HourClock("25:00");
+const targetOutput7 = "01:00 am";
+console.assert(
+  currentOutput7 === targetOutput7,
+  `current output: ${currentOutput7}, target output: ${targetOutput7}`
+);
+
+// modified code:
+
+function formatAs12HourClock(time) {
+  let hours = Number(time.slice(0, 2));
+  const minutes = time.slice(3);
+
+  let suffix;
+  if (hours >= 12) {
+    suffix = "pm";
+
+  } else {
+    suffix = "am";
+  }
+  hours = hours % 12 || 12; // Convert 0 to 12, 13 to 1
+  const formattedHours = hours.toString().padStart(2, '0');
+
+  return `${formattedHours}:${minutes} ${suffix}`;
+}
+
+const currentOutput6 = formatAs12HourClock("23:00");
+const targetOutput6 = "11:00 pm";
+console.assert(
+  currentOutput6 === targetOutput6,
+  `current output: ${currentOutput6}, target output: ${targetOutput6}`
+);