Birmingham | 26-ITP-JAN | Merve Reis | Sprint 1 | Module Structuring and Testing Data

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

@@ -4,3 +4,6 @@ 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
+// Line 3 is updating the value of the count variable by adding 1 to its current value. 
+// The = operator is an assignment operator that assigns the result of the expression on the right (count + 1) 
+// back to the variable on the left (count). This effectively increments the count variable by 1 each time this line is executed.

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

@@ -5,7 +5,10 @@ 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];
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 
+

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

@@ -17,7 +17,8 @@ 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(0, lastSlashIndex);
+const ext = filePath.slice(filePath.lastIndexOf(".") + 1);
+
 
 // https://www.google.com/search?q=slice+mdn

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

@@ -7,3 +7,11 @@ 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
+
+//Breakdown
+// Math.random() generates a random decimal number in the interval (0, 1).
+// (maximum - minimum + 1) calculates the range of numbers which is 100 - 1 + 1 = 100.
+// Multiplying Math.random() by (maximum - minimum + 1) scales the random decimal to the interval [0, 100).
+// The Math.floor() rounds down the number to the nearest whole number, giving us an integer in [0, 99].
+// Adding minimum (which is 1) shifts the interval from [0, 99] to [1, 100].
+// Therefore, num is a random integer in the interval [1, 100].

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

@@ -1,2 +1,5 @@
 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?
+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

@@ -2,3 +2,6 @@
 
 const age = 33;
 age = age + 1;
+
+let age = 33;
+age = age + 1;

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

@@ -3,3 +3,4 @@
 
 console.log(`I was born in ${cityOfBirth}`);
 const cityOfBirth = "Bolton";
+console.log(`I was born in ${cityOfBirth}`);

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

@@ -7,3 +7,10 @@ const last4Digits = cardNumber.slice(-4);
 // 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
+
+// Prediction: The code won't work because cardNumber is a number, and the slice method is a string method.
+// When we try to call slice on a number, it will throw a TypeError because numbers do not have the slice method.
+// To fix this, we can convert cardNumber to a string before calling slice on it.
+
+const last4Digits = String(cardNumber).slice(-4);
+

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

@@ -1,2 +1,5 @@
 const 12HourClockTime = "20:53";
-const 24hourClockTime = "08:53";
+const 24hourClockTime = "08:53";
+
+const twelveHourClockTime = "20:53";
+const twentyFourHourClockTime = "08:53";

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

@@ -20,3 +20,23 @@ console.log(`The percentage change is ${percentageChange}`);
 // d) Identify all the lines that are variable declarations
 
 // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
+
+priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
+
+// a) there are 5 function calls in this file,// Line 4: replaceAll(",", "") and Number()
+// Line 5: replaceAll(",", "") and Number()
+// Line 9: console.log()
+
+// b) The error is coming from line 4 and line 5.  
+// The error occurred because a comma was missing between the arguments while redefining priceAfterOneYear variable at line 4 and 24.(",", "")
+//  To fix this problem, we need to put comma between the arguments or we can remove the commas from the strings before converting them to numbers. 
+
+// c) The variable reassignment statements are on line 4 and line 5, where carPrice and 
+// priceAfterOneYear are being reassigned to the result of the Number() function.
+
+// d) The variable declarations are on line 1 and line 2, where carPrice and priceAfterOneYear are declared and initialized with string values.
+
+// e) The expression Number(carPrice.replaceAll(",","")) is doing the following:
+// 1. This part of the expression takes the string value of carPrice (which is "10,000") and removes all comma, resulting in the string "10000".
+// 2. Number(...): This part takes the resulting string "10000" and converts it into a number (10000). 
+

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

@@ -23,3 +23,10 @@ console.log(result);
 // e) What do you think the variable result represents? Can you think of a better name for this variable?
 
 // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer
+
+// a) There are 6 variable declarations in this program: movieLength, remainingSeconds, totalMinutes, remainingMinutes, totalHours, and result.
+// b) There is 1 function call in this program: console.log(result).
+// c) The movieLength % 60 calculates the remainder. This gives us the number of seconds .
+// d) The totalMinutes subtracts the extra seconds to get a clean number, then divides by 60 to find the total whole minutes.
+// e) The variable result represents the formatted string of hours, minutes, and seconds for the movie length. A better name could be formattedTime.
+// f) This code will work for positive integers, but it doesn't add a leading zero to single digits (e.g., it prints 2:5:9 instead of 02:05:09).

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

@@ -11,9 +11,9 @@ const pounds = paddedPenceNumberString.substring(
   paddedPenceNumberString.length - 2
 );
 
-const pence = paddedPenceNumberString
-  .substring(paddedPenceNumberString.length - 2)
-  .padEnd(2, "0");
+const pence = paddedPenceNumberString.substring(
+  paddedPenceNumberString.length - 2
+);
 
 console.log(`£${pounds}.${pence}`);
 
@@ -23,5 +23,24 @@ console.log(`£${pounds}.${pence}`);
 // You need to do a step-by-step breakdown of each line in this program
 // Try and describe the purpose / rationale behind each step
 
-// To begin, we can start with
-// 1. const penceString = "399p": initialises a string variable with the value "399p"
+//1. const penceString = "399p": initializes a string variable with the value "399p"
+
+// 2 to 6.const penceStringWithoutTrailingP = penceString.substring(0,penceString.length - 1);
+//  removes the (p) at the end determined by removing the sudstring at the total length of the string -1
+
+// 8.const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+//    makes sure the string is at least 3 characters long and if it is not it padds it with "0"
+
+// 9.const pounds = paddedPenceNumberString.substring( 0, paddedPenceNumberString.length - 2);
+//     gets the ammout of pounds by making a sub string that starts at the firts character (0) to the paddedPenceNumberString length -2 to exclued the last 2 characters (the p)
+
+// 10.const pence = paddedPenceNumberString .substring(paddedPenceNumberString.length - 2);
+// Gets the amount of pence by making a substring that starts at the paddedPenceNumberString length -2 to get the last 2 characters
+
+// 18.console.log(`£${pounds}.${pence}`);
+//      gives the console the result using a string literal
+//console.log(`£${pounds}.${pence}`); :
+
+// Combines the pounds and pence into a standard currency format and prints it to the console, "£3.99"
+// The program takes a string representing a price in pence (e.g., "399p")
+// and converts it to a string representing the price in pounds (e.g., "£3.99").

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

@@ -16,3 +16,14 @@ Now try invoking the function `prompt` with a string input of `"What is your nam
 
 What effect does calling the `prompt` function have?
 What is the return value of `prompt`?
+
+//What effect does calling the `alert` function have?
+a pop up appered  saying hello world
+
+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?
+it give a pop up with a text input 
+What is the return value of `prompt`?
+the return is what is entered into the text input if it is blank you will get ''
+

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

@@ -14,3 +14,10 @@ Answer the following questions:
 
 What does `console` store?
 What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?
+
+//log() { [native code] }Now enter just `console` in the Console, what output do you get back?console {debug: ƒ, error: ƒ, info: ƒ, log: ƒ, warn: ƒ, …}assert: ƒ assert()clear: ƒ clear()context: ƒ context()count: ƒ count()countReset: ƒ countReset()createTask: ƒ createTask()debug: ƒ debug()dir: ƒ dir()dirxml: ƒ dirxml()error: ƒ error()group: ƒ group()groupCollapsed: ƒ groupCollapsed()groupEnd: ƒ groupEnd()info: ƒ info()log: ƒ log()memory: MemoryInfo {totalJSHeapSize: 12700000, usedJSHeapSize: 10000000, jsHeapSizeLimit: 2330000000}profile: ƒ profile()profileEnd: ƒ profileEnd()table: ƒ table()time: ƒ time()timeEnd: ƒ timeEnd()timeLog: ƒ timeLog()timeStamp: ƒ timeStamp()trace: ƒ trace()warn: ƒ warn()length: 0name: "warn"arguments: (...)caller: (...)[[Prototype]]: ƒ ()[[Scopes]]: Scopes[0]Symbol(Symbol.toStringTag): "console"[[Prototype]]: Object[[Prototype]]: Object
+Try also entering `typeof console`'object'
+Answer the following questions:What does `console` store?the console stores objects
+What does the syntax `console.log` or `console.assert` mean?
+In particular, what does the `.` mean?
+the . denotes what kind of object the console is being told to use and what to do with the data it has been given , the . operator called dot operator or property access operator and it is used to access properties or methods of an object.