ITP JAN25 | KATARZYNA_KAZIMIERCZUK | STRUCTURING_AND_TESTING_DATA | SPRINT2

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

@@ -4,3 +4,5 @@ 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
+
+//in line 3 the count plus 1 is assigned to the previously declared and assigned variable count

Sprint-1/1-key-exercises/2-initials.js

@@ -5,7 +5,7 @@ let lastName = "Johnson";
 // Declare a variable called initials that stores the first character of each string.
 // This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
 
-let initials = ``;
+let initials = [firstName[0], middleName[0], lastName[0]].join('');
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 

Sprint-1/1-key-exercises/3-paths.js

@@ -17,7 +17,12 @@ console.log(`The base part of ${filePath} is ${base}`);
 // Create a variable to store the dir part of the filePath variable
 // Create a variable to store the ext part of the variable
 
-const dir = ;
-const ext = ;
+
+// dir: The part of the path before the last slash (/), which represents the directory.
+// base: The file name with the extension, which is everything after the last slash (/).
+// ext: The file extension, which is the part after the last period (.) in the base file name.
+
+const dir = filePath.slice(0, lastSlashIndex);
+const ext = base.theLastIndexOf('.');
 
 // https://www.google.com/search?q=slice+mdn

Sprint-1/1-key-exercises/4-random.js

@@ -7,3 +7,10 @@ const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 // Try breaking down the expression and using documentation to explain what it means
 // It will help to think about the order in which expressions are evaluated
 // Try logging the value of num and running the program several times to build an idea of what the program is doing
+console.log(num)
+
+//gets a random number between 1 and 100
+//math.floor random float between 0 and 1, < 1
+//math.floor round down to int
+// + 1 to inlude max value so 100
+

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

@@ -1,2 +1,2 @@
-This is just an instruction for the first activity - but it is just for human consumption
-We don't want the computer to run these 2 lines - how can we solve this problem?
+// This is just an instruction for the first activity - but it is just for human consumption
+// We don't want the computer to run these 2 lines - how can we solve this problem?

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

@@ -1,4 +1,7 @@
 // trying to create an age variable and then reassign the value by 1
 
-const age = 33;
-age = age + 1;
+// const age = 33;
+let age = 33;
+// age = age + 1;
+age = age ++;
+

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

@@ -1,5 +1,8 @@
 // Currently trying to print the string "I was born in Bolton" but it isn't working...
 // what's the error ?
 
-console.log(`I was born in ${cityOfBirth}`);
+// console.log(`I was born in ${cityOfBirth}`);
+// const cityOfBirth = "Bolton";
+
 const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);

Sprint-1/2-mandatory-errors/3.js

@@ -1,9 +1,14 @@
 const cardNumber = 4533787178994213;
-const last4Digits = cardNumber.slice(-4);
+
+// const last4Digits = cardNumber.slice(-4);
 
 // The last4Digits variable should store the last 4 digits of cardNumber
-// However, the code isn't working
+// However, the code isn't working 
 // Before running the code, make and explain a prediction about why the code won't work
 // Then run the code and see what error it gives.
 // Consider: Why does it give this error? Is this what I predicted? If not, what's different?
 // Then try updating the expression last4Digits is assigned to, in order to get the correct value
+
+// slice works on strings, not integers
+
+const last4Digits = cardNumber.toString().slice(-4);

Sprint-1/2-mandatory-errors/4.js

@@ -1,2 +1,7 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+// const 12HourClockTime = "20:53";
+// const 24hourClockTime = "08:53";
+
+//there are no instructions here
+//the variable names start with numbers and it is incorrect
+const tvelveHourClockTime = "20:53";
+const twentyhourClockTime = "08:53";

Sprint-1/3-mandatory-interpret/1-percentage-change.js

@@ -2,7 +2,8 @@ let carPrice = "10,000";
 let priceAfterOneYear = "8,543";
 
 carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+// priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," "")); missing ,
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", "")); 
 
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
@@ -12,11 +13,12 @@ console.log(`The percentage change is ${percentageChange}`);
 // Read the code and then answer the questions below
 
 // a) How many function calls are there in this file? Write down all the lines where a function call is made
-
+//5
 // b) Run the code and identify the line where the error is coming from - why is this error occurring? How can you fix this problem?
-
+// 4
 // c) Identify all the lines that are variable reassignment statements
-
+// 4, 6
 // d) Identify all the lines that are variable declarations
-
+// 1, 2, 8, 9
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+// replace all instances a , with ""

Sprint-1/3-mandatory-interpret/2-time-format.js

@@ -1,4 +1,5 @@
-const movieLength = 8784; // length of movie in seconds
+// const movieLength = 8784; // length of movie in seconds
+const movieLength = -2; // length of movie in seconds
 
 const remainingSeconds = movieLength % 60;
 const totalMinutes = (movieLength - remainingSeconds) / 60;
@@ -12,14 +13,15 @@ console.log(result);
 // For the piece of code above, read the code and then answer the following questions
 
 // a) How many variable declarations are there in this program?
-
+// 6
 // b) How many function calls are there?
-
+// 1
 // c) Using documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
-
+// it calculates whats the reminder of dividing total minutes by 60
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
-
+// it calculates the length fof the movie minus seconds divided by 60 to get the total time in minutes
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
-
+//leftToPlay
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+// it doesn not produce the correct result for a negative value

Sprint-1/3-mandatory-interpret/3-to-pounds.js

@@ -25,3 +25,7 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+//2 penceStringWithoutTrailingP uses substring method to return the value before the p
+//3 padStart method is used to add 0 until the string has the length of 3
+//4 substring method is used to return the string value without the final 2 
+//5 pence adds 00 at the end to achieve the length of 2

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

@@ -1,13 +1,20 @@
 // Predict and explain first...
 //  =============> write your prediction here
+//
+// function to capitalize the first letter of a string passed as a parameter
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
+//str has been declared as a param befre being declared 
 
-function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
-  return str;
-}
-
+// function capitalise(str) {
+//   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
+//   return str;
+// }
+console.log(capitalise('string'))
 // =============> write your explanation here
 // =============> write your new code here
+function capitalise(str) {
+  str = `${str[0].toUpperCase()}${str.slice(1)}`;
+  return str;
+}

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

@@ -2,19 +2,25 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
+// decimal number has been declared in the funcion scope as a param 
+// and is not accessible outside of the function scope to console.log it will throw an error
 
 // Try playing computer with the example to work out what is going on
+decimalNumber = 0.5;
 
 function convertToPercentage(decimalNumber) {
-  const decimalNumber = 0.5;
+
   const percentage = `${decimalNumber * 100}%`;
 
   return percentage;
 }
 
 console.log(decimalNumber);
+console.log(convertToPercentage(decimalNumber));
 
 // =============> write your explanation here
+// decim alNumber has to be availabke outside of the function scope to log its value
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+console.log(decimalNumber);

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

@@ -4,17 +4,20 @@
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
-
-function square(3) {
-    return num * num;
-}
+//a number value is hardcoded in the param instead of passing a reference to a parameter
+// function square(3) {
+//     return num * num;
+// }
 
 // =============> write the error message here
-
+// SyntaxError: Unexpected number
 // =============> explain this error message here
-
+//the function expected a parameter
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
+function square(num) {
+    return num * num;
+}
 
-
+console.log(square(2))

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

@@ -1,14 +1,21 @@
 // Predict and explain first...
 
 // =============> write your prediction here
+//function does not run but is prining the resut into console
 
-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
+// return the result
 
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+const multiply = (a, b) => a*b
+
+multiply(10, 32)
+
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);

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

@@ -1,13 +1,17 @@
 // Predict and explain first...
 //  =============> write your prediction here
+//return is befror ethe operation and the calculation is a dead code
+// 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
+// return a+b
 // Finally, correct the code to fix the problem
 //  =============> write your new code here
+
+const sum = (a,b) => a+b
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);

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

@@ -2,23 +2,37 @@
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+//num is hardcoded and the function will return the same value each time
+// 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
+// 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
+//num is not reassigned each time the function runs
+
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+// const num = 103;
+
+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

@@ -14,6 +14,11 @@
 // Then when we call this function with the weight and height
 // 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
-}
+function calculateBMI(weight, heightM) {
+    let heightCM = heightM/100
+    return parseFloat((weight / (heightCM*heightCM))).toFixed(1); 
+}
+
+// const calculateBMI = (weight, height) => parseFloat(weight / (height*height)).toFixed(1)
+
+console.log(calculateBMI(59, 167))

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
+
+const convertToUpper = (word) => word.toUpperCase()
+
+console.log(convertToUpper('kaska'))
+console.log(convertToUpper('kas_ka'))