Manchester | 26-ITP-Jan | Ofonime Edak| Sprint 3 | Dead Code

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

@@ -2,12 +2,28 @@
 //  =============> write your prediction here
 
 // 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;
+  let outputStr = `${str[0].toUpperCase()}${str.slice(1)}`;
+  console.log(outputStr);
+  return outputStr;
 }
+capitalise("edak");
 
 // =============> write your explanation here
+
+//expecting the function to return the  characters of the string, with the first character capitalized.
+
+//syntaxError: Identifier 'str' has already been declared.
+// The variable str  has already been passed as parameter in the function (), declaring it again cause an identity error
+
 // =============> write your new code here
+
+// function capitalise(str) {
+// let outputStr = `${str[0].toUpperCase()}${str.slice(1)}`;
+// console.log(outputStr);
+// return outputStr;
+//};
+//capitalise('edak')

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

@@ -1,8 +1,10 @@
 // Predict and explain first...
 
 // Why will an error occur when this program runs?
-// =============> write your prediction here
 
+// =============> write your prediction here
+// decimalNumber is supplied as a function parameter and and also declared as a variable,
+// it will throw an identifier syntaxError.
 // Try playing computer with the example to work out what is going on
 
 function convertToPercentage(decimalNumber) {
@@ -15,6 +17,15 @@ function convertToPercentage(decimalNumber) {
 console.log(decimalNumber);
 
 // =============> write your explanation here
-
+// playing computer with the first code throw syntaxError: decimalNumber has been already declared.
 // Finally, correct the code to fix the problem
+
 // =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+  // const decimalNumber = 0.5;
+  const percentage = `${decimalNumber * 100}%`;
+  return percentage;
+}
+
+console.log(convertToPercentage(0.5));

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

@@ -1,20 +1,28 @@
 
 // Predict and explain first BEFORE you run any code...
+//This code is to take one number function parameter and return  area.
 
 // this function should square any number but instead we're going to get an error
 
-// =============> write your prediction of the error here
+// =============> write your prediction of the error here.
+// syntaxError: passing an argument instead for a parameter.
 
 function square(3) {
     return num * num;
 }
 
 // =============> write the error message here
+//SyntaxError:Unexpected number
 
 // =============> explain this error message here
+//The function was not expecting number during declaration
 
 // Finally, correct the code to fix the problem
 
-// =============> write your new code here
 
+// =============> write your new code here
 
+//function square(num) {
+ //   return num * num;
+//}
+//console.log(square(3))

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

@@ -1,6 +1,7 @@
 // Predict and explain first...
 
 // =============> write your prediction here
+// multiply function is to return the product of a and b
 
 function multiply(a, b) {
   console.log(a * b);
@@ -9,6 +10,14 @@ function multiply(a, b) {
 console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
 // =============> write your explanation here
+//The logic for multiplication is in the console.log() function which main purpose is to log it to the console.
 
 // 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

@@ -1,5 +1,6 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// This function is to return the sum of a and b
 
 function sum(a, b) {
   return;
@@ -9,5 +10,14 @@ function sum(a, b) {
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
 // =============> write your explanation here
+// the function above returns undefined because the return statement terminates
+// the code before it gets to the operation (a+b)
 // 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

@@ -2,6 +2,7 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+//This code convert number to string and make a copy of the last character using the reverse indexing
 
 const num = 103;
 
@@ -15,10 +16,23 @@ 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 last digit of 42 is 3
+//The last digit of 105 is 3
+//The last digit of 806 is 3
+
 // Explain why the output is the way it is
 // =============> write your explanation here
+//The output is the way it is because the variable was declared as a fixed global variable and not as a function parameter
 // 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) {
-    // return the BMI of someone based off their weight and height
-}
+  // return the BMI of someone based off their weight and height
+  const bmi = weight / height ** 2;
+  return Math.round(bmi * 10) / 10;
+}
+console.log(calculateBMI(70, 1.75));

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

@@ -14,3 +14,17 @@
 // 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 snakeCasing(str) {
+  const capitalize = str.toUpperCase();
+
+  const arr = capitalize.split(" ");
+  return arr.join("_");
+}
+
+console.log(snakeCasing("ofonime edak"));
+
+function snakeCasingAlt(str) {
+  return str.toUpperCase().replaceAll(" ", "_");
+}
+
+console.log(snakeCasingAlt("ofonime edak Sunday"));

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

@@ -4,3 +4,24 @@
 // 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("50p"));
+console.log(toPounds("030p"));

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

@@ -1,5 +1,8 @@
 function pad(num) {
-  return num.toString().padStart(2, "0");
+  console.log(num);
+  const result = num.toString().padStart(2, "0");
+  console.log(result);
+  return result;
 }
 
 function formatTimeDisplay(seconds) {
@@ -8,27 +11,35 @@ function formatTimeDisplay(seconds) {
   const remainingMinutes = totalMinutes % 60;
   const totalHours = (totalMinutes - remainingMinutes) / 60;
 
-  return `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
+  const time = `${pad(totalHours)}:${pad(remainingMinutes)}:${pad(remainingSeconds)}`;
+  console.log(time);
+  return time;
 }
 
+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 is called three times in line 11 of the formatTimeDisplay().
 // 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
-
+// value of num=0
 // c) What is the return value of pad is called for the first time?
 // =============> write your answer here
+// it returns 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
+//value is 1
+//the frame side when pad is called the last time num is assigned a value of 01
 
 // 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
+// =============> write your answer here num is assigned a value of one when pad is called for the
+// last time by the formatTimeDisplay function this value is used to evaluate the remaining seconds.

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

@@ -3,13 +3,18 @@
 // 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));
+  const hours = time.slice(0, 2);
+  const minutes = time.slice(3, 5);
+
   if (hours > 12) {
-    return `${hours - 12}:00 pm`;
+    return `${Number(hours) - 12}:${minutes} pm`;
+  } else if (Number(hours) === 0) {
+    return `12:${minutes} am`;
   }
-  return `${time} am`;
+  return `${hours}:${minutes} am`;
 }
 
+//Test cases
 const currentOutput = formatAs12HourClock("08:00");
 const targetOutput = "08:00 am";
 console.assert(
@@ -23,3 +28,24 @@ 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 currentOutput5 = formatAs12HourClock("15:01");
+const targetOutput5 = "3:01 pm";
+console.assert(
+  currentOutput5 === targetOutput5,
+  `current output: ${currentOutput5}, target output: ${targetOutput5}`
+);
+
+const currentOutput6 = formatAs12HourClock("15:01");
+const targetOutput6 = "3:01 pm";
+console.assert(
+  currentOutput6 === targetOutput6,
+  `current output: ${currentOutput6}, target output: ${targetOutput6}`
+);

Sprint-3/3-dead-code/exercise-1.js

@@ -1,17 +1,10 @@
 // Find the instances of unreachable and redundant code - remove them!
 // The sayHello function should continue to work for any reasonable input it's given.
 
-let testName = "Jerry";
-const greeting = "hello";
-
 function sayHello(greeting, name) {
   const greetingStr = greeting + ", " + name + "!";
   return `${greeting}, ${name}!`;
-  console.log(greetingStr);
 }
-
-testName = "Aman";
-
-const greetingMessage = sayHello(greeting, testName);
+const greetingMessage = sayHello('hello', 'Aman!');
 
 console.log(greetingMessage); // 'hello, Aman!'

Sprint-3/3-dead-code/exercise-2.js

@@ -2,7 +2,6 @@
 // The countAndCapitalisePets function should continue to work for any reasonable input it's given, and you shouldn't modify the pets variable.
 
 const pets = ["parrot", "hamster", "horse", "dog", "hamster", "cat", "hamster"];
-const capitalisedPets = pets.map((pet) => pet.toUpperCase());
 const petsStartingWithH = pets.filter((pet) => pet[0] === "h");
 
 function logPets(petsArr) {