From 22e0557e8c1cadff8df1e9ebd2f2b4c08a938377 Mon Sep 17 00:00:00 2001 From: Carol Date: Tue, 22 Sep 2026 20:40:13 +0100 Subject: [PATCH] completed Sprint 2 tasks --- Sprint-2/1-key-exercises/1-count.js | 2 ++ Sprint-2/1-key-exercises/2-initials.js | 6 +++++- Sprint-2/1-key-exercises/3-paths.js | 8 ++++++-- Sprint-2/1-key-exercises/4-random.js | 4 ++++ Sprint-2/2-mandatory-errors/0.js | 6 ++++-- Sprint-2/2-mandatory-errors/1.js | 5 +++++ Sprint-2/2-mandatory-errors/2.js | 5 ++++- Sprint-2/2-mandatory-errors/3.js | 5 +++++ Sprint-2/2-mandatory-errors/4.js | 9 +++++++-- .../1-percentage-change.js | 18 +++++++++++++----- .../3-mandatory-interpret/2-time-format.js | 7 ++++++- Sprint-2/3-mandatory-interpret/3-to-pounds.js | 5 +++++ Sprint-2/4-stretch-explore/chrome.md | 2 +- Sprint-2/4-stretch-explore/objects.md | 2 +- 14 files changed, 68 insertions(+), 16 deletions(-) diff --git a/Sprint-2/1-key-exercises/1-count.js b/Sprint-2/1-key-exercises/1-count.js index 117bcb2b6..baa67cfba 100644 --- a/Sprint-2/1-key-exercises/1-count.js +++ b/Sprint-2/1-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 + +//Answer: The = means assignment. The value of count is 0 but it increments by 1 \ No newline at end of file diff --git a/Sprint-2/1-key-exercises/2-initials.js b/Sprint-2/1-key-exercises/2-initials.js index 964c9563c..9e091800e 100644 --- a/Sprint-2/1-key-exercises/2-initials.js +++ b/Sprint-2/1-key-exercises/2-initials.js @@ -1,10 +1,14 @@ const firstName = "Creola"; const middleName = "Katherine"; const lastName = "Johnson"; +// const initial = "initials"; +// const index = 1; +// console.log('The ${Initial} ${index} is ${firstName.charAt(index)}'); // 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. -const initials = ``; +const initials = firstName[0] + middleName[0] + lastName[0]; +console.log(initials) // https://www.google.com/search?q=get+first+character+of+string+mdn diff --git a/Sprint-2/1-key-exercises/3-paths.js b/Sprint-2/1-key-exercises/3-paths.js index ab90ebb28..796e8fbfa 100644 --- a/Sprint-2/1-key-exercises/3-paths.js +++ b/Sprint-2/1-key-exercises/3-paths.js @@ -17,7 +17,11 @@ 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 = base.slice(base.lastIndexOf(".")); + +console.log(`The dir part of ${filePath} is ${dir}`); +console.log(`The ext part of ${base} is ${ext}`); + // https://www.google.com/search?q=slice+mdn \ No newline at end of file diff --git a/Sprint-2/1-key-exercises/4-random.js b/Sprint-2/1-key-exercises/4-random.js index 292f83aab..88875d8ea 100644 --- a/Sprint-2/1-key-exercises/4-random.js +++ b/Sprint-2/1-key-exercises/4-random.js @@ -7,3 +7,7 @@ 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 + +// Answer: For calculations i utilised BODMAS formula solving numbers in brackets first, multiplication, subtraction and addition +// I used 0.68 for math.floor(random number) + 1 +// Sum = 69 \ No newline at end of file diff --git a/Sprint-2/2-mandatory-errors/0.js b/Sprint-2/2-mandatory-errors/0.js index cf6c5039f..5f3f3c523 100644 --- a/Sprint-2/2-mandatory-errors/0.js +++ b/Sprint-2/2-mandatory-errors/0.js @@ -1,2 +1,4 @@ -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? \ No newline at end of file +// 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? + +// I have commented out the lines. The computer removes commented lines from code compilation \ No newline at end of file diff --git a/Sprint-2/2-mandatory-errors/1.js b/Sprint-2/2-mandatory-errors/1.js index 7a43cbea7..d636bc7ea 100644 --- a/Sprint-2/2-mandatory-errors/1.js +++ b/Sprint-2/2-mandatory-errors/1.js @@ -2,3 +2,8 @@ const age = 33; age = age + 1; + +console.log(age) + +// The TypeError: Assignment to constant variable implies we are trying to reassign the variable twice. +// This case, I have used let instead in order to allow the variable to be reused. \ No newline at end of file diff --git a/Sprint-2/2-mandatory-errors/2.js b/Sprint-2/2-mandatory-errors/2.js index e09b89831..a57367694 100644 --- a/Sprint-2/2-mandatory-errors/2.js +++ b/Sprint-2/2-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}`); const cityOfBirth = "Bolton"; +console.log(`I was born in ${cityOfBirth}`); + +// The error is ReferenceError: Cannot access 'cityOfBirth' before initialization +// Answer: I switched the order by declaring the const first before calling /printing \ No newline at end of file diff --git a/Sprint-2/2-mandatory-errors/3.js b/Sprint-2/2-mandatory-errors/3.js index ec101884d..4d0bf6de2 100644 --- a/Sprint-2/2-mandatory-errors/3.js +++ b/Sprint-2/2-mandatory-errors/3.js @@ -7,3 +7,8 @@ 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 was the code would run successfully without error although with the wrong results due to absence of syntax errors in the file +// Error returned: TypeError: cardNumber.slice is not a function +// Lesson learnt here; slice method is only available for strings or arrays not numbers +// So converted the cardNumber into a string first \ No newline at end of file diff --git a/Sprint-2/2-mandatory-errors/4.js b/Sprint-2/2-mandatory-errors/4.js index 5f86c730b..580680287 100644 --- a/Sprint-2/2-mandatory-errors/4.js +++ b/Sprint-2/2-mandatory-errors/4.js @@ -1,2 +1,7 @@ -const 12HourClockTime = "8:53pm"; -const 24hourClockTime = "20:53"; +const twelveHourClockTime = "8:53pm"; +const twentyFourHourClockTime = "20:53"; +console.log(twelveHourClockTime); +console.log(twentyFourHourClockTime); + +// Error - SyntaxError: Invalid or unexpected token +// lesson learnt - variables cannot start with a number diff --git a/Sprint-2/3-mandatory-interpret/1-percentage-change.js b/Sprint-2/3-mandatory-interpret/1-percentage-change.js index e24ecb8e1..3cd429dc3 100644 --- a/Sprint-2/3-mandatory-interpret/1-percentage-change.js +++ b/Sprint-2/3-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 +12,19 @@ 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 - +// 2 +//carPrice = Number(carPrice.replaceAll(",", "")); +//priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ",")); // 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? - +//b) error = SyntaxError: missing ) after argument list +// (",", ",")); - added , between quoted values // c) Identify all the lines that are variable reassignment statements - +//carPrice = Number(carPrice.replaceAll(",", "")); +//priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ",")); // d) Identify all the lines that are variable declarations - +//let carPrice = "10,000"; +//let priceAfterOneYear = "8,543"; +//const priceDifference = carPrice - priceAfterOneYear; +//const percentageChange = (priceDifference / carPrice) * 100; // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression? +// e) cleans the amount format by removing characters such as , and leaving only number \ No newline at end of file diff --git a/Sprint-2/3-mandatory-interpret/2-time-format.js b/Sprint-2/3-mandatory-interpret/2-time-format.js index 47d239558..c5d68119a 100644 --- a/Sprint-2/3-mandatory-interpret/2-time-format.js +++ b/Sprint-2/3-mandatory-interpret/2-time-format.js @@ -12,14 +12,19 @@ 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 variables // b) How many function calls are there? - +// 2 // c) Using documentation, explain what the expression movieLength % 60 represents // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators +// It means 60 % remainder of Movie length // d) Interpret line 4, what does the expression assigned to totalMinutes mean? +// totalMinutes is assigned a value of the result from (movieLength - remainingSeconds) / 60; // e) What do you think the variable result represents? Can you think of a better name for this variable? +// I think its the total movie length with a timer. Based on research it appears to be template literal variable as it mixes static text with dynamic data. Sorry I don't fully understand this bit yet // f) Try experimenting with different values of movieLength. Will this code work for all values of movieLength? Explain your answer +//any number greater than zero returns a valid positive hour, minute or seconds result. Changing the length to 0 returns 0:0:0. Any negative length returns negative values diff --git a/Sprint-2/3-mandatory-interpret/3-to-pounds.js b/Sprint-2/3-mandatory-interpret/3-to-pounds.js index 60c9ace69..06114b75d 100644 --- a/Sprint-2/3-mandatory-interpret/3-to-pounds.js +++ b/Sprint-2/3-mandatory-interpret/3-to-pounds.js @@ -25,3 +25,8 @@ console.log(`£${pounds}.${pence}`); // To begin, we can start with // 1. const penceString = "399p": initialises a string variable with the value "399p" +// 2. const penceStringWithoutTrailingP = penceString.substring(0): sets penceStringWithoutTRailingP = 399.0 - penceString -1 = 39 +// 3. const paddedPenceNumberString - ensures the figure is 3 characters to taking us back to 399 +// 4 const pounds - removes 2 characters from the amount = 3 +// 5. const pence - adds the amount by 2 characters taking us back to either 39 or 99 +// 6. console displays the figures in pounds and pence = 3.99 \ No newline at end of file diff --git a/Sprint-2/4-stretch-explore/chrome.md b/Sprint-2/4-stretch-explore/chrome.md index 962580b82..7a24c0bfa 100644 --- a/Sprint-2/4-stretch-explore/chrome.md +++ b/Sprint-2/4-stretch-explore/chrome.md @@ -12,4 +12,4 @@ What effect does calling the `alert` function have? 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`? +What is the return value of `prompt`?. diff --git a/Sprint-2/4-stretch-explore/objects.md b/Sprint-2/4-stretch-explore/objects.md index 0216dee56..bebb00f08 100644 --- a/Sprint-2/4-stretch-explore/objects.md +++ b/Sprint-2/4-stretch-explore/objects.md @@ -13,4 +13,4 @@ Try also entering `typeof console` Answer the following questions: What does `console` store? -What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean? +What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean?.