ITP_GLASGOW_MAR | HANNA_MYKYTIUK | MODULE_STRUCTURING_AND_TESTING_DATA | SPRINT_1

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

@@ -1,6 +1,6 @@
-let count = 0;
+let count = 0; //Variable "count" created and assigned value equal to 0.
 
-count = count + 1;
+count = count + 1; // Variable "count" assigned new value, equal old value + 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

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

@@ -5,7 +5,9 @@ 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.charAt(0)+middleName.charAt(0)+lastName.charAt(0);
+console.log(initials);
+
 
 // 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 = ;
+
+const dir =filePath.slice(1,lastSlashIndex) ;
+console.log(`****The dir part of ${filePath} is ${dir}`);
+const lastIndexOfDot = filePath.lastIndexOf(".");
+const ext = filePath.slice(lastIndexOfDot);
+console.log(`**** The ext pert of ${filePath} is ${ext}`);
+
 
 // https://www.google.com/search?q=slice+mdn

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

@@ -1,7 +1,14 @@
 const minimum = 1;
 const maximum = 100;
 
-const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
+for ( let i = 0; i < 1000; i++){
+    const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
+    console.log(num);
+}
+// Math module used  to generate random integer in range from 1 to 100, and assign it to variable "num"
+// function ".random()" gives random float number fron 0 to 1
+// after this value multiplayed onto "(maximum - minimum + 1)" wich with give constants is equal to 100
+// function ".floor()" returns the largest integer less than or equal to a result of previous multiplication.
 
 // In this exercise, you will need to work out what num represents?
 // Try breaking down the expression and using documentation to explain what it means

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 +1,6 @@
 // trying to create an age variable and then reassign the value by 1
 
-const age = 33;
+let age = 33;
 age = age + 1;
+
+console.log(age);

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

@@ -1,5 +1,6 @@
 // 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}`);
 const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);
+

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

@@ -1,4 +1,4 @@
-const cardNumber = 4533787178994213;
+const cardNumber = "4533787178994213";
 const last4Digits = cardNumber.slice(-4);
 
 // The last4Digits variable should store the last 4 digits of cardNumber

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

@@ -1,2 +1,2 @@
-const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+const TwelveHourClockTime = "20:53";
+const TwentyFourHourClockTime = "08:53";

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

@@ -2,7 +2,7 @@ let carPrice = "10,000";
 let priceAfterOneYear = "8,543";
 
 carPrice = Number(carPrice.replaceAll(",", ""));
-priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
 
 const priceDifference = carPrice - priceAfterOneYear;
 const percentageChange = (priceDifference / carPrice) * 100;
@@ -12,11 +12,12 @@ 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
-
+    // Three functions calls in lines 4,5,10
 // 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?
-
+    // The error in line 5
 // c) Identify all the lines that are variable reassignment statements
-
+    //Reassignment in line 4,5
 // d) Identify all the lines that are variable declarations
-
+    //The variable declarations are in line 1,2,7,8
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+    //This code removes comas from prices before conversion to numbers.

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

@@ -1,4 +1,4 @@
-const movieLength = 8784; // length of movie in seconds
+const movieLength = 50; // length of movie in seconds
 
 const remainingSeconds = movieLength % 60;
 const totalMinutes = (movieLength - remainingSeconds) / 60;
@@ -12,14 +12,15 @@ 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?
-
+    // Thera are 6 variable declarations
 // b) How many function calls are there?
-
+    // Thera is one function.
 // c) Using documentation, explain what the expression movieLength % 60 represents
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators
-
+    // The remainder (%) operator returns the remainder left over when one operand is divided by a second operand. It always takes the sign of the dividend.
 // d) Interpret line 4, what does the expression assigned to totalMinutes mean?
-
+    // It shows the number of full minutes in movie
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
-
+    // It shows the lengs of movie in format hours:minutes:seconds
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+     // It will works

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

@@ -25,3 +25,9 @@ console.log(`£${pounds}.${pence}`);
 
 // To begin, we can start with
 // 1. const penceString = "399p": initialises a string variable with the value "399p"
+// 3. const penceStringWithoutTrailingP declared and assighed value - substring of penceString that's
+//  starts with 0 and end withouts last chracter
+// 8. const paddedPenceNumberString declared and assighed value - If string penceStringWithoutTrailingP shorter than
+// 3 characters,  it add 0 to the starts.
+// 14. const pence declared and assighed value - substring from variable paddedPenceNumberString ( last two characters)
+// If string pence shorter than 2 characters,  it add 0 to the end.

Sprint-1/4-stretch-explore/chrome.md

@@ -11,8 +11,10 @@ In the Chrome console,
 invoke the function `alert` with an input string of `"Hello world!"`;
 
 What effect does calling the `alert` function have?
+    //Pop up window with hello message appears.
 
 Now try invoking the function `prompt` with a string input of `"What is your name?"` - store the return value of your call to `prompt` in an variable called `myName`.
 
 What effect does calling the `prompt` function have?
 What is the return value of `prompt`?
+    //Pop up window with input field appears, after input function returns inputed string into Console.

Sprint-1/4-stretch-explore/objects.md

@@ -5,12 +5,20 @@ In this activity, we'll explore some additional concepts that you'll encounter i
 Open the Chrome devtools Console, type in `console.log` and then hit enter
 
 What output do you get?
+    // We got output like: ƒ log() { [native code] }
 
 Now enter just `console` in the Console, what output do you get back?
+    // We got: console {debug: ƒ, error: ƒ, info: ƒ, log: ƒ, warn: ƒ, …}
 
 Try also entering `typeof console`
+    //We got: 'object'
 
 Answer the following questions:
 
-What does `console` store?
+What does `console` store? 
+    // Console store object, wich has methods to display different messages in console;
 What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
+    //'.' - allows us to use functions and properties of console object.
+    // `log` and `assert` are these functions 
+    // `console.log` to display console messages
+    // `console.assert`to write an error message to the console in case of assertion failed

Sprint-3/1-key-implement/1-get-angle-type.js

@@ -9,7 +9,10 @@
 
 function getAngleType(angle) {
    if (angle === 90) return "Right angle";
-   // read to the end, complete line 36, then pass your test here
+   if (angle < 90) return "Acute angle";
+   if (angle >90 && angle < 180) return "Obtuse angle";
+   if (angle === 180) return "Straight angle";
+   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 +46,16 @@ 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);
-// ====> write your test here, and then add a line to pass the test in the function above
+assertEquals(obtuse,"Obtuse angle");
 
 // Case 4: Identify Straight Angles:
 // When the angle is exactly 180 degrees,
 // Then the function should return "Straight angle"
-// ====> write your test here, and then add a line to pass the test in the function above
+const straight = getAngleType(180);
+assertEquals(straight, "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"
-// ====> write your test here, and then add a line to pass the test in the function above
+const reflex = getAngleType(200);
+assertEquals(reflex, "Reflex angle");

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;
-}
+    if (numerator < denominator) {
+      return true;
+    } else if ( numerator >= denominator) {
+      return false;
+    }
+} 
 
 // here's our helper again
 function assertEquals(actualOutput, targetOutput) {
@@ -40,13 +44,15 @@ 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:

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

@@ -8,7 +8,22 @@
 // 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 (rank === "A") return 11;
+  let rank;
+  if (card === "10"){
+    rank = card;
+  } else {
+    rank = card.charAt(0);
+  }
+
+  if (rank === "A") {
+    return 11;
+  } else if  (Number(rank) >= 2 && Number(rank) <= 9) {
+    return Number(rank);
+  } else if (rank === "10" || rank === "J" || rank === "Q" || rank === "K") {
+    return 10;
+  } else {
+    throw new Error("Invalid card rank");
+  }
 }
 
 // You need to write assertions for your function to check it works in different cases
@@ -33,19 +48,30 @@ 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♥");
-// ====> write your test here, and then add a line to pass the test in the function above
+assertEquals(fiveofHearts, 5);
 
 // 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 faceCard = getCardValue("10");
+assertEquals(faceCard, 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 handleAce = getCardValue("A");
+assertEquals(handleAce, 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."
+try {
+  const invalidCard = getCardValue("g");
+  assertEquals(invalidCard, "Invalid card rank.");
+} catch(error){
+  console.log(error.message);
+}
+

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

@@ -1,16 +1,11 @@
 function getAngleType(angle) {
   if (angle === 90) return "Right angle";
-  // replace with your completed function from key-implement
-
+  if (angle < 90) return "Acute angle";
+  if (angle >90 && angle < 180) return "Obtuse angle";
+  if (angle === 180) return "Straight angle";
+  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

@@ -7,18 +7,18 @@ test("should identify right angle (90°)", () => {
 // 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(40)).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° and < 180°)", () => {
+  expect(getAngleType(120)).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° and < 360°)", () => {
+  expect(getAngleType(200)).toEqual("Reflex angle");
+});

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

@@ -1,6 +1,9 @@
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
-    // add your completed function from key-implement here
+    if (numerator < denominator) {
+        return true;
+    } else if ( numerator >= denominator) {
+        return false;
+    }
 }
 
 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 true for a improper fraction", () => {
+  expect(isProperFraction(5, 3)).toEqual(false);
+});
 
 // Case 3: Identify Negative Fractions:
+test("should return true for a negative fraction", () => {
+  expect(isProperFraction(-2, 3)).toEqual(true);
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return true for a equal fraction", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});