ITPJan | KATARZYNA KAZIMIERCZUK | STRUCTURING AND TESTING DATA | SPRINT1

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 +5,8 @@ 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]];
+let solution = initials.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 +1,4 @@
 const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+const 24hourClockTime = "08:53";
+
+//there are no instructions here

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
-
+//3
 // 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?
-
+// 0
 // 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-3/1-key-implement/1-get-angle-type.js

@@ -10,6 +10,11 @@
 function getAngleType(angle) {
    if (angle === 90) return "Right angle";
    // read to the end, complete line 36, then pass your test here
+   else if (angle < 90) return "Acute angle";
+   else if (angle > 90 && angle < 180) return "Obtuse angle";
+   else if (angle === 180) return "Straight angle";
+   else if (angle > 180 && angle < 360) return "Reflex angle";
+
 }
 
 // we're going to use this helper function to make our assertions easier to read
@@ -43,14 +48,19 @@ assertEquals(acute, "Acute angle");
 // When the angle is greater than 90 degrees and less than 180 degrees,
 // Then the function should return "Obtuse angle"
 const obtuse = getAngleType(120);
+assertEquals(obtuse, "Obtuse angle")
 // ====> write your test here, and then add a line to pass the test in the function above
 
 // Case 4: Identify Straight Angles:
 // When the angle is exactly 180 degrees,
 // Then the function should return "Straight angle"
+const straight = getAngleType(180);
+assertEquals(straight, 'Straight angle') 
 // ====> write your test here, and then add a line to pass the test in the function above
 
 // Case 5: Identify Reflex Angles:
 // When the angle is greater than 180 degrees and less than 360 degrees,
 // Then the function should return "Reflex angle"
+const reflex = getAngleType(181)
+assertEquals(reflex, 'Reflex angle')
 // ====> write your test here, and then add a line to pass the test in the function above

Sprint-3/1-key-implement/2-is-proper-fraction.js

@@ -8,8 +8,12 @@
 // write one test at a time, and make it pass, build your solution up methodically
 
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
+   //check if numerator is negative or positive
+    numerator = numerator < 0 ? Math.abs(numerator) : numerator;
+    let result = numerator < denominator ? true : false;
+    return result;
 }
+//I understand this can be shorter as well return numerator < denominator without putting in variable, this is because it's easier for me
 
 // here's our helper again
 function assertEquals(actualOutput, targetOutput) {
@@ -40,14 +44,23 @@ assertEquals(improperFraction, false);
 // target output: true
 // Explanation: The fraction -4/7 is a proper fraction because the absolute value of the numerator (4) is less than the denominator (7). The function should return true.
 const negativeFraction = isProperFraction(-4, 7);
+assertEquals(negativeFraction, true);
 // ====> complete with your assertion
 
 // Equal Numerator and Denominator check:
 // Input: numerator = 3, denominator = 3
 // target output: false
 // Explanation: The fraction 3/3 is not a proper fraction because the numerator is equal to the denominator. The function should return false.
 const equalFraction = isProperFraction(3, 3);
+assertEquals(equalFraction, false)
 // ====> complete with your assertion
 
 // Stretch:
 // What other scenarios could you test for?
+
+// Zero Numerator and Denominator check:
+// Input: numerator = 0, denominator = 4
+// target output: false
+// Explanation: The fraction 0/3 is not a proper fraction because the numerator is 0. The function should return false.
+const zeroFraction = isProperFraction(0, 3);
+assertEquals(equalFraction, false)

Sprint-3/1-key-implement/3-get-card-value.js

@@ -7,10 +7,37 @@
 // complete the rest of the tests and cases
 // write one test at a time, and make it pass, build your solution up methodically
 // just make one change at a time -- don't rush -- programmers are deep and careful thinkers
+// function getCardValue(card) {
+//     if (card === "A") return 11;
+// }//   switch (rank) {
+//   case "A":
+//      return 11;
+//   break;
+// }
+
 function getCardValue(card) {
-    if (rank === "A") return 11;
+      if (card.slice(0, 2) == '10') {
+      return 10;
+      }
+      let rank = card.length > 2 ? card.slice(0,2) : card[0];
+
+      if (rank === 'A') {
+      return 11;
+      } else if (rank >= 2 && rank <= 9) {
+      return parseInt(rank);
+      } else if (rank === 'J' || rank === 'Q' || rank === 'K') {
+      return 10;
+      } else
+    //check if not valid
+  // const allCards = ['A', 'K', 'Q', 'J', '10', '9', '8', '7', '6', '5', '4', '3', '2'];
+  // if (!allCards.includes(card))  
+  // here i was getting errors when this condition was at the beginning, so instead I implemented if input oes not match then it is invalid
+      return "Invalid card rank"
+
 }
 
+
+
 // You need to write assertions for your function to check it works in different cases
 // we're going to use this helper function to make our assertions easier to read
 // if the actual output matches the target output, the test will pass
@@ -33,19 +60,26 @@ assertEquals(aceofSpades, 11);
 // When the function is called with such a card,
 // Then it should return the numeric value corresponding to the rank (e.g., "5" should return 5).
 const fiveofHearts = getCardValue("5♥");
+assertEquals(fiveofHearts, 5);
 // ====> write your test here, and then add a line to pass the test in the function above
 
 // Handle Face Cards (J, Q, K):
 // Given a card with a rank of "10," "J," "Q," or "K",
 // When the function is called with such a card,
 // Then it should return the value 10, as these cards are worth 10 points each in blackjack.
+const tenofSpades = getCardValue("10♥");
+assertEquals(tenofSpades, 10);
 
 // Handle Ace (A):
 // Given a card with a rank of "A",
 // When the function is called with an Ace,
 // Then it should, by default, assume the Ace is worth 11 points, which is a common rule in blackjack.
+const aceofSpadesS = getCardValue("A");
+assertEquals(aceofSpades, 11);
 
 // Handle Invalid Cards:
 // Given a card with an invalid rank (neither a number nor a recognized face card),
 // When the function is called with such a card,
-// Then it should throw an error indicating "Invalid card rank."
+// // Then it should throw an error indicating "Invalid card rank."
+const invalid = getCardValue("c");
+assertEquals(invalid, 'Invalid card rank');

Sprint-3/2-mandatory-rewrite/1-get-angle-type.js

@@ -1,16 +1,12 @@
 function getAngleType(angle) {
   if (angle === 90) return "Right angle";
-  // replace with your completed function from key-implement
-
+  else if (angle < 90) return "Acute angle";
+  else if (angle > 90 && angle < 180) return "Obtuse angle";
+  else if (angle === 180) return "Straight angle";
+  else if (angle > 180 && angle < 360) return "Reflex angle";
 }
 
 
-
-
-
-
-
-
 // Don't get bogged down in this detail
 // Jest uses CommonJS module syntax by default as it's quite old
 // We will upgrade our approach to ES6 modules in the next course module, so for now 

Sprint-3/2-mandatory-rewrite/1-get-angle-type.test.js

@@ -4,21 +4,18 @@ test("should identify right angle (90°)", () => {
   expect(getAngleType(90)).toEqual("Right angle");
 });
 
-// REPLACE the comments with the tests
-// make your test descriptions as clear and readable as possible
-
-// Case 2: Identify Acute Angles:
-// When the angle is less than 90 degrees,
-// Then the function should return "Acute angle"
+test("should identify acute angle (< 90°)", () => {
+  expect(getAngleType(60)).toEqual("Acute angle");
+});
 
-// Case 3: Identify Obtuse Angles:
-// When the angle is greater than 90 degrees and less than 180 degrees,
-// Then the function should return "Obtuse angle"
+test("should identify obtuse angle (> 90° < 120°)", () => {
+  expect(getAngleType(111)).toEqual("Obtuse angle");
+});
 
-// Case 4: Identify Straight Angles:
-// When the angle is exactly 180 degrees,
-// Then the function should return "Straight angle"
+test("should identify straight angle (180°)", () => {
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
 
-// Case 5: Identify Reflex Angles:
-// When the angle is greater than 180 degrees and less than 360 degrees,
-// Then the function should return "Reflex angle"
+test("should identify reflex angle (> 180° < 360°)", () => {
+  expect(getAngleType(181)).toEqual("Reflex angle");
+});

Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.js

@@ -1,6 +1,8 @@
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
-    // add your completed function from key-implement here
+    numerator = numerator < 0 ? Math.abs(numerator) : numerator;
+    let result = numerator < denominator ? true : false;
+    return result;
 }
+// or shorter return numerator < denominator because it already returns a boolean 
 
 module.exports = isProperFraction;

Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.test.js

@@ -5,7 +5,16 @@ test("should return true for a proper fraction", () => {
 });
 
 // Case 2: Identify Improper Fractions:
+test("should return false for an improper fraction", () => {
+  expect(isProperFraction(5, 2)).toEqual(false);
+});
 
 // Case 3: Identify Negative Fractions:
+test("should return true for a negative fraction", () => {
+  expect(isProperFraction(-4, 7)).toEqual(true);
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return false for an equal numerator and demnomiator fraction", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});