Skip to content

Commit 258aecc

Browse files
AbidAkhtar-techAbidAkhtar-tech
committed
Sprint-1 exercises done
1 parent 2694eea commit 258aecc

15 files changed

Lines changed: 281 additions & 241 deletions

File tree

‎Sprint-1/1-key-exercises/1-count.js‎

Lines changed: 8 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -1,9 +1,9 @@
1-
let count = 0;
2-
3-
count = count + 1;
4-
5-
// Line 1 is a variable declaration, creating the count variable with an initial value of 0
6-
// Describe what line 3 is doing, in particular focus on what = is doing
7-
8-
1+
let count = 0;
2+
3+
count = count + 1;
4+
5+
// Line 1 is a variable declaration, creating the count variable with an initial value of 0
6+
// Describe what line 3 is doing, in particular focus on what = is doing
7+
8+
99
// In line 3 JS takes the current value of count which is 0, adds 1 to it and then stores the result back into count variable on the left.

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

Lines changed: 12 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -1,12 +1,12 @@
1-
let firstName = "Creola";
2-
let middleName = "Katherine";
3-
let lastName = "Johnson";
4-
5-
// Declare a variable called initials that stores the first character of each string.
6-
// This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
7-
8-
let initials = `${firstName.charAt(0)} ${middleName.charAt(0)} ${lastName.charAt(0)}`;
9-
10-
// https://www.google.com/search?q=get+first+character+of+string+mdn
11-
12-
console.log(initials);
1+
let firstName = "Creola";
2+
let middleName = "Katherine";
3+
let lastName = "Johnson";
4+
5+
// Declare a variable called initials that stores the first character of each string.
6+
// This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
7+
8+
let initials = `${firstName.charAt(0)} ${middleName.charAt(0)} ${lastName.charAt(0)}`;
9+
10+
// https://www.google.com/search?q=get+first+character+of+string+mdn
11+
12+
console.log(initials);

‎Sprint-1/1-key-exercises/3-paths.js‎

Lines changed: 23 additions & 23 deletions
Original file line numberDiff line numberDiff line change
@@ -1,24 +1,24 @@
1-
// The diagram below shows the different names for parts of a file path on a Unix operating system
2-
3-
// ┌─────────────────────┬────────────┐
4-
// │ dir │ base │
5-
// ├──────┬ ├──────┬─────┤
6-
// │ root │ │ name │ ext │
7-
// " / home/user/dir / file .txt "
8-
// └──────┴──────────────┴──────┴─────┘
9-
10-
// (All spaces in the "" line should be ignored. They are purely for formatting.)
11-
12-
const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
13-
const lastSlashIndex = filePath.lastIndexOf("/");
14-
const base = filePath.slice(lastSlashIndex + 1);
15-
console.log(`The base part of ${filePath} is ${base}`);
16-
17-
// Create a variable to store the dir part of the filePath variable
18-
// Create a variable to store the ext part of the variable
19-
20-
const dir = filePath.slice(0, lastSlashIndex);
21-
const ext = base.slice(base.lastIndexOf(".") + 1);
22-
23-
1+
// The diagram below shows the different names for parts of a file path on a Unix operating system
2+
3+
// ┌─────────────────────┬────────────┐
4+
// │ dir │ base │
5+
// ├──────┬ ├──────┬─────┤
6+
// │ root │ │ name │ ext │
7+
// " / home/user/dir / file .txt "
8+
// └──────┴──────────────┴──────┴─────┘
9+
10+
// (All spaces in the "" line should be ignored. They are purely for formatting.)
11+
12+
const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
13+
const lastSlashIndex = filePath.lastIndexOf("/");
14+
const base = filePath.slice(lastSlashIndex + 1);
15+
console.log(`The base part of ${filePath} is ${base}`);
16+
17+
// Create a variable to store the dir part of the filePath variable
18+
// Create a variable to store the ext part of the variable
19+
20+
const dir = filePath.slice(0, lastSlashIndex);
21+
const ext = base.slice(base.lastIndexOf(".") + 1);
22+
23+
2424
// https://www.google.com/search?q=slice+mdn

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

Lines changed: 24 additions & 24 deletions
Original file line numberDiff line numberDiff line change
@@ -1,25 +1,25 @@
1-
const minimum = 1;
2-
const maximum = 100;
3-
4-
const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
5-
6-
// In this exercise, you will need to work out what num represents?
7-
// Try breaking down the expression and using documentation to explain what it means
8-
// It will help to think about the order in which expressions are evaluated
9-
// Try logging the value of num and running the program several times to build an idea of what the program is doing
10-
11-
12-
/*
13-
14-
In this exercise, num is a variable that stores the random whole number generated by the expression so it can be used later in the program.
15-
16-
1. Math.randon() picks a random decimal number
17-
18-
2. maximum - minimum + 1; finds how many numbers are in the range
19-
20-
3. Math.floor() rounds the decimal down
21-
22-
4. +minimum adds the minimum value
23-
24-
1+
const minimum = 1;
2+
const maximum = 100;
3+
4+
const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
5+
6+
// In this exercise, you will need to work out what num represents?
7+
// Try breaking down the expression and using documentation to explain what it means
8+
// It will help to think about the order in which expressions are evaluated
9+
// Try logging the value of num and running the program several times to build an idea of what the program is doing
10+
11+
12+
/*
13+
14+
In this exercise, num is a variable that stores the random whole number generated by the expression so it can be used later in the program.
15+
16+
1. Math.randon() picks a random decimal number
17+
18+
2. maximum - minimum + 1; finds how many numbers are in the range
19+
20+
3. Math.floor() rounds the decimal down
21+
22+
4. +minimum adds the minimum value
23+
24+
2525
*/

‎Sprint-1/2-mandatory-errors/0.js‎

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
1-
2-
/* This is just an instruction for the first activity - but it is just for human consumption
3-
We don't want the computer to run these 2 lines - how can we solve this problem?
4-
5-
*/
1+
2+
/* This is just an instruction for the first activity - but it is just for human consumption
3+
We don't want the computer to run these 2 lines - how can we solve this problem?
4+
5+
*/

‎Sprint-1/2-mandatory-errors/1.js‎

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
1-
// trying to create an age variable and then reassign the value by 1
2-
3-
let age = 33;
4-
age = age + 1;
5-
1+
// trying to create an age variable and then reassign the value by 1
2+
3+
let age = 33;
4+
age = age + 1;
5+

‎Sprint-1/2-mandatory-errors/2.js‎

Lines changed: 6 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,6 @@
1-
// Currently trying to print the string "I was born in Bolton" but it isn't working...
2-
// what's the error ?
3-
4-
5-
const cityOfBirth = "Bolton";
6-
console.log(`I was born in ${cityOfBirth}`);
1+
// Currently trying to print the string "I was born in Bolton" but it isn't working...
2+
// what's the error ?
3+
4+
5+
const cityOfBirth = "Bolton";
6+
console.log(`I was born in ${cityOfBirth}`);

‎Sprint-1/2-mandatory-errors/3.js‎

Lines changed: 13 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -1,13 +1,13 @@
1-
const cardNumber = 4533787178994213;
2-
const last4Digits = cardNumber.toString().slice(-4);
3-
4-
console.log(last4Digits);
5-
6-
// This code will not work as written because cardNumber is a number, and numbers do not have a .slice() method.
7-
8-
// The last4Digits variable should store the last 4 digits of cardNumber
9-
// However, the code isn't working
10-
// Before running the code, make and explain a prediction about why the code won't work
11-
// Then run the code and see what error it gives.
12-
// Consider: Why does it give this error? Is this what I predicted? If not, what's different?
13-
// Then try updating the expression last4Digits is assigned to, in order to get the correct value
1+
const cardNumber = 4533787178994213;
2+
const last4Digits = cardNumber.toString().slice(-4);
3+
4+
console.log(last4Digits);
5+
6+
// This code will not work as written because cardNumber is a number, and numbers do not have a .slice() method.
7+
8+
// The last4Digits variable should store the last 4 digits of cardNumber
9+
// However, the code isn't working
10+
// Before running the code, make and explain a prediction about why the code won't work
11+
// Then run the code and see what error it gives.
12+
// Consider: Why does it give this error? Is this what I predicted? If not, what's different?
13+
// Then try updating the expression last4Digits is assigned to, in order to get the correct value

‎Sprint-1/2-mandatory-errors/4.js‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1,2 +1,2 @@
1-
const _12HourClockTime = "8:53pm";
2-
const _24hourClockTime = "20:53";
1+
const _12HourClockTime = "8:53pm";
2+
const _24hourClockTime = "20:53";

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

Lines changed: 60 additions & 22 deletions
Original file line numberDiff line numberDiff line change
@@ -1,22 +1,60 @@
1-
let carPrice = "10,000";
2-
let priceAfterOneYear = "8,543";
3-
4-
carPrice = Number(carPrice.replaceAll(",", ""));
5-
priceAfterOneYear = Number(priceAfterOneYear.replaceAll("," ""));
6-
7-
const priceDifference = carPrice - priceAfterOneYear;
8-
const percentageChange = (priceDifference / carPrice) * 100;
9-
10-
console.log(`The percentage change is ${percentageChange}`);
11-
12-
// Read the code and then answer the questions below
13-
14-
// a) How many function calls are there in this file? Write down all the lines where a function call is made
15-
16-
// 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?
17-
18-
// c) Identify all the lines that are variable reassignment statements
19-
20-
// d) Identify all the lines that are variable declarations
21-
22-
// e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
1+
let carPrice = "10,000";
2+
let priceAfterOneYear = "8,543";
3+
4+
carPrice = Number(carPrice.replaceAll(",", ""));
5+
priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
6+
7+
const priceDifference = carPrice - priceAfterOneYear;
8+
const percentageChange = (priceDifference / carPrice) * 100;
9+
10+
console.log(`The percentage change is ${percentageChange}`);
11+
12+
// Read the code and then answer the questions below
13+
14+
// a) How many function calls are there in this file? Write down all the lines where a function call is made
15+
16+
// 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?
17+
18+
// c) Identify all the lines that are variable reassignment statements
19+
20+
// d) Identify all the lines that are variable declarations
21+
22+
// e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression?
23+
24+
/*
25+
26+
a) How many function calls are there?
27+
28+
There are 5 function calls.
29+
30+
1. carPrice.replaceAll(",", "")
31+
2. Number(......)
32+
3. priceAfterOneYear.replaceAll(",", "")
33+
4. Number(......)
34+
5. console.log(.....)
35+
36+
b) Why is the error occurring?
37+
38+
Because of the missing comma in the function call ReplaceAll() on line 5
39+
40+
c) Variable reassignments
41+
42+
1. carPrice = Number(carPrice.replaceAll(",", ""));
43+
2. priceAfterOneYear = Number(priceAfterOneYear.replaceAll(",", ""));
44+
45+
d) all the variable declarations
46+
47+
1. let carPrice = "10,000";
48+
2. let priceAfterOneYear = "8,543";
49+
3. const priceDifference = carPrice - priceAfterOneYear;
50+
4. const percentageChange = (priceDifference / carPrice) * 100;
51+
52+
53+
e)What is the expression doing?
54+
55+
The replaceAll() removes commas from the string and Number() function call converts the string to a number.
56+
57+
The expression removes the commas from the price string and converts the result into a number so it can be used in mathematical calculations.
58+
59+
60+
*/

0 commit comments

Comments
 (0)