Activity 17: Data Structure Again

List, Object, and List of Objects

List
A list is a structured sequence of elements where each item has a defined position, and the data type of the elements can vary. These items could be integers, strings, or even more complex data types, such as other lists. Lists are flexible and allow for duplicate entries, meaning you can have the same element appear more than once. One of their most important features is mutability, which means the list can be altered—items can be added, removed, or updated after it has been created.
Key Characteristics:
- Ordered: The sequence of elements is maintained, so each item has a specific position.
- Mutable: Lists can be modified, allowing you to change, add, or remove elements at any time.
- Indexed: Each item is associated with an index, starting from 0, which makes it easy to access elements based on their position.
- Allows Duplicates: The same element can appear multiple times, enabling redundancy when necessary.

This flexibility makes lists a powerful data structure for handling ordered collections of data that need to be accessed or modified frequently.

Object

An object is a data structure that consists of pairs of keys and values, often referred to as properties or attributes. In an object, each key must be unique, allowing it to be directly linked to a specific value, which can vary in data type. Objects are particularly useful for modeling real-world entities and encapsulating their associated characteristics.

Key Characteristics:
- Key-Value Pairs: Each property within an object is defined by a unique key that corresponds to its associated value, making it easy to retrieve specific information.
- Mutable: The values of the properties in an object can be modified, allowing for updates and changes to the data it holds.
- Unordered: Unlike lists, the arrangement of key-value pairs in an object is not fixed; hence, there is no guarantee of their sequence.

This structure provides a versatile way to organize and manage data, especially when dealing with complex entities that possess various attributes.

List of Objects
Definition:
A list of objects is a collection where each item in the list is an object. This structure allows for the organization of multiple entities, each having its own set of properties defined as key-value pairs.

Characteristics:
- Combines Lists and Objects: Each item in the list is an object, which can have multiple attributes.
- Ordered Collection: The order of objects in the list is maintained.
- Mutable: You can add, remove, or modify objects within the list.

Apply the concepts of list, object, and list of objects

Product Table

ID	NAME	CATEGORY	PRICE	STOCK	SUPPLIER EMAIL
1	LAPTOP	ELECTRONICS	750	50	supplier@gmail.com
2	DESK CHAIR	FURNITURE	100	200	supplier@gmail.com
3	SMART WATCH	ELECTRONICS	200	150	supplier@gmail.com
4	NOTEBOOK	STATIONARY	5	500	supplier@gmail.com
5	RUNNING SHOES	APPAREL	80	100	supplier@gmail.com

product_name_list = ["Laptop", "Desk Chair", "Smartwatch", "Notebook", "Running Shoes"]
product_category_list = ["Electronics", "Furniture", "Electronics", "Stationery", "Apparel"]
product_id_list = [1, 2, 3, 4, 5]
product_price_list = [750, 100, 200, 5, 80]
product_stock_list = [50, 200, 150, 500, 100]
product_supplier_email_list = ["supplier1@gmail.com", "supplier2@gmail.com", "supplier3@gmail.com", "supplier4@gmail.com", "supplier5@gmail.com"]

Object

An object combines several properties of a single entity, such as ID, Name, Category, Price, Stock, and Supplier Email. For example, an object can represent one product, encapsulating all its relevant details in one structure.

product_object1 = {
    "name": "Laptop",
    "category": "Electronics",
    "id": 1,
    "price": 750,
    "stock": 50,
    "supplier_email": "supplier1@gmail.com"
}

product_object2 = {
    "name": "Desk Chair",
    "category": "Furniture",
    "id": 2,
    "price": 100,
    "stock": 200,
    "supplier_email": "supplier2@gmail.com"
}

product_object3 = {
    "name": "Smartwatch",
    "category": "Electronics",
    "id": 3,
    "price": 200,
    "stock": 150,
    "supplier_email": "supplier3@gmail.com"
}

product_object4 = {
    "name": "Notebook",
    "category": "Stationery",
    "id": 4,
    "price": 5,
    "stock": 500,
    "supplier_email": "supplier4@gmail.com"
}

product_object5 = {
    "name": "Running Shoes",
    "category": "Apparel",
    "id": 5,
    "price": 80,
    "stock": 100,
    "supplier_email": "supplier5@gmail.com"
}

List of Objects

A list of objects is a structure that merges the concepts of lists and objects. In this case, each object in the list represents a distinct entity, such as a product, and the list itself contains multiple of these objects. This allows for organized storage and easy access to various entities and their associated properties.

products = [
    {
        "id": 1,
        "name": "Laptop",
        "category": "Electronics",
        "price": 750,
        "stock": 50,
        "supplier_email": "supplier1@gmail.com"
    },
    {
        "id": 2,
        "name": "Desk Chair",
        "category": "Furniture",
        "price": 100,
        "stock": 200,
        "supplier_email": "supplier2@gmail.com"
    },
    {
        "id": 3,
        "name": "Smartwatch",
        "category": "Electronics",
        "price": 200,
        "stock": 150,
        "supplier_email": "supplier3@gmail.com"
    },
    {
        "id": 4,
        "name": "Notebook",
        "category": "Stationery",
        "price": 5,
        "stock": 500,
        "supplier_email": "supplier4@gmail.com"
    },
    {
        "id": 5,
        "name": "Running Shoes",
        "category": "Apparel",
        "price": 80,
        "stock": 100,
        "supplier_email": "supplier5@gmail.com"
    }
]

Employee Table

ID	Name	Department	Age	Email
1	John Doe	Sales	30	john.doe@company.com
2	Jane Smith	Human Resources	25	jane.smith@company.com
3	Mark Johnson	IT	40	mark.johnson@company.com
4	Lisa Wong	Marketing	28	lisa.wong@company.com
5	Paul McDonald	Finance	35	paul.mcdonald@company.com

LIST

employee_name_list = ["John Doe", "Jane Smith", "Mark Johnson", "Lisa Wong", "Paul McDonald"]
employee_department_list = ["Sales", "Human Resources", "IT", "Marketing", "Finance"]
employee_id_list = [1, 2, 3, 4, 5]
employee_age_list = [30, 25, 40, 28, 35]
employee_email_list = ["john.doe@company.com", "jane.smith@company.com", "mark.johnson@company.com", "lisa.wong@company.com", "paul.mcdonald@company.com"]

OBJECT

employee_object1 = {
    "id": 1,
    "name": "John Doe",
    "department": "Sales",
    "age": 30,
    "email": "john.doe@company.com"
}

employee_object2 = {
    "id": 2,
    "name": "Jane Smith",
    "department": "Human Resources",
    "age": 25,
    "email": "jane.smith@company.com"
}

employee_object3 = {
    "id": 3,
    "name": "Mark Johnson",
    "department": "IT",
    "age": 40,
    "email": "mark.johnson@company.com"
}

employee_object4 = {
    "id": 4,
    "name": "Lisa Wong",
    "department": "Marketing",
    "age": 28,
    "email": "lisa.wong@company.com"
}

employee_object5 = {
    "id": 5,
    "name": "Paul McDonald",
    "department": "Finance",
    "age": 35,
    "email": "paul.mcdonald@company.com"
}

LIST OF OBJECTS

employees = [
    {
        "id": 1,
        "name": "John Doe",
        "department": "Sales",
        "age": 30,
        "email": "john.doe@company.com"
    },
    {
        "id": 2,
        "name": "Jane Smith",
        "department": "Human Resources",
        "age": 25,
        "email": "jane.smith@company.com"
    },
    {
        "id": 3,
        "name": "Mark Johnson",
        "department": "IT",
        "age": 40,
        "email": "mark.johnson@company.com"
    },
    {
        "id": 4,
        "name": "Lisa Wong",
        "department": "Marketing",
        "age": 28,
        "email": "lisa.wong@company.com"
    },
    {
        "id": 5,
        "name": "Paul McDonald",
        "department": "Finance",
        "age": 35,
        "email": "paul.mcdonald@company.com"
    }
]

Book’s Table

ID	Title	Author	Genre	Published Year	ISBN
1	The Great Gatsby	F. Scott Fitzgerald	Fiction	1925	978-0743273565
2	To Kill a Mockingbird	Harper Lee	Fiction	1960	978-0060935467
3	1984	George Orwell	Dystopian	1949	978-0451524935
4	The Catcher in the Rye	J.D. Salinger	Fiction	1951	978-0316769488
5	A Brief History of Time	Stephen Hawking	Non-Fiction	1988	978-0553380163

LIST

book_id_list = [1, 2, 3, 4, 5]
book_title_list = ["The Great Gatsby", "To Kill a Mockingbird", "1984", "The Catcher in the Rye", "A Brief History of Time"]
book_author_list = ["F. Scott Fitzgerald", "Harper Lee", "George Orwell", "J.D. Salinger", "Stephen Hawking"]
book_genre_list = ["Fiction", "Fiction", "Dystopian", "Fiction", "Non-fiction"]
book_published_year_list = [1925, 1960, 1949, 1951, 1988]
book_isbn_list = ["978-0743273565", "978-0060935467", "978-0451524935", "978-0316769488", "978-0553380163"]
book_stock_list = [20, 35, 40, 25, 10]
book_price_list = [15.99, 10.99, 9.99, 8.99, 18.99]

OBJECT

book1 = {
    "id": 1,
    "title": "The Great Gatsby",
    "author": "F. Scott Fitzgerald",
    "genre": "Fiction",
    "published_year": 1925,
    "isbn": "978-0743273565",
    "stock": 20,
    "price": 15.99
}

book2 = {
    "id": 2,
    "title": "To Kill a Mockingbird",
    "author": "Harper Lee",
    "genre": "Fiction",
    "published_year": 1960,
    "isbn": "978-0060935467",
    "stock": 35,
    "price": 10.99
}

book3 = {
    "id": 3,
    "title": "1984",
    "author": "George Orwell",
    "genre": "Dystopian",
    "published_year": 1949,
    "isbn": "978-0451524935",
    "stock": 40,
    "price": 9.99
}

book4 = {
    "id": 4,
    "title": "The Catcher in the Rye",
    "author": "J.D. Salinger",
    "genre": "Fiction",
    "published_year": 1951,
    "isbn": "978-0316769488",
    "stock": 25,
    "price": 8.99
}

book5 = {
    "id": 5,
    "title": "A Brief History of Time",
    "author": "Stephen Hawking",
    "genre": "Non-fiction",
    "published_year": 1988,
    "isbn": "978-0553380163",
    "stock": 10,
    "price": 18.99
}

LIST OF OBJECTS

books = [
    {
        "id": 1,
        "title": "The Great Gatsby",
        "author": "F. Scott Fitzgerald",
        "genre": "Fiction",
        "published_year": 1925,
        "isbn": "978-0743273565",
        "stock": 20,
        "price": 15.99
    },
    {
        "id": 2,
        "title": "To Kill a Mockingbird",
        "author": "Harper Lee",
        "genre": "Fiction",
        "published_year": 1960,
        "isbn": "978-0060935467",
        "stock": 35,
        "price": 10.99
    },
    {
        "id": 3,
        "title": "1984",
        "author": "George Orwell",
        "genre": "Dystopian",
        "published_year": 1949,
        "isbn": "978-0451524935",
        "stock": 40,
        "price": 9.99
    },
    {
        "id": 4,
        "title": "The Catcher in the Rye",
        "author": "J.D. Salinger",
        "genre": "Fiction",
        "published_year": 1951,
        "isbn": "978-0316769488",
        "stock": 25,
        "price": 8.99
    },
    {
        "id": 5,
        "title": "A Brief History of Time",
        "author": "Stephen Hawking",
        "genre": "Non-fiction",
        "published_year": 1988,
        "isbn": "978-0553380163",
        "stock": 10,
        "price": 18.99
    }
]

University’s Table

ID	Name	Location	Established Year	Type	Website
1	University of the Philippines	Quezon City	1908	Public	up.edu.ph
2	Ateneo de Manila University	Quezon City	1859	Private	ateneo.edu
3	De La Salle University	Manila	1911	Private	dlsu.edu.ph
4	University of Santo Tomas	Manila	1611	Private	ust.edu.ph
5	Polytechnic University of the Philippines	Manila	1904	Public	pup.edu.ph

LIST

university_id_list = [1, 2, 3, 4, 5]
university_name_list = ["University of the Philippines", "Ateneo de Manila University", "De La Salle University", "University of Santo Tomas", "Polytechnic University of the Philippines"]
university_location_list = ["Quezon City", "Quezon City", "Manila", "Manila", "Manila"]
university_established_year_list = [1908, 1859, 1911, 1611, 1904]
university_type_list = ["Public", "Private", "Private", "Private", "Public"]
university_website_list = ["www.up.edu.ph", "www.ateneo.edu", "www.dlsu.edu.ph", "www.ust.edu.ph", "www.pup.edu.ph"]

OBJECT

university1 = {
    "id": 1,
    "name": "University of the Philippines",
    "location": "Quezon City",
    "established_year": 1908,
    "type": "Public",
    "website": "www.up.edu.ph"
}

university2 = {
    "id": 2,
    "name": "Ateneo de Manila University",
    "location": "Quezon City",
    "established_year": 1859,
    "type": "Private",
    "website": "www.ateneo.edu"
}

university3 = {
    "id": 3,
    "name": "De La Salle University",
    "location": "Manila",
    "established_year": 1911,
    "type": "Private",
    "website": "www.dlsu.edu.ph"
}

university4 = {
    "id": 4,
    "name": "University of Santo Tomas",
    "location": "Manila",
    "established_year": 1611,
    "type": "Private",
    "website": "www.ust.edu.ph"
}

university5 = {
    "id": 5,
    "name": "Polytechnic University of the Philippines",
    "location": "Manila",
    "established_year": 1904,
    "type": "Public",
    "website": "www.pup.edu.ph"
}

LIST OF OBJECTS

universities = [
    {
        "id": 1,
        "name": "University of the Philippines",
        "location": "Quezon City",
        "established_year": 1908,
        "type": "Public",
        "website": "www.up.edu.ph"
    },
    {
        "id": 2,
        "name": "Ateneo de Manila University",
        "location": "Quezon City",
        "established_year": 1859,
        "type": "Private",
        "website": "www.ateneo.edu"
    },
    {
        "id": 3,
        "name": "De La Salle University",
        "location": "Manila",
        "established_year": 1911,
        "type": "Private",
        "website": "www.dlsu.edu.ph"
    },
    {
        "id": 4,
        "name": "University of Santo Tomas",
        "location": "Manila",
        "established_year": 1611,
        "type": "Private",
        "website": "www.ust.edu.ph"
    },
    {
        "id": 5,
        "name": "Polytechnic University of the Philippines",
        "location": "Manila",
        "established_year": 1904,
        "type": "Public",
        "website": "www.pup.edu.ph"
    }
]

Restaurant’s Table

ID	Name	Location	Cuisine Type	Established Year	Website or Contact
1	Vikings Luxury Buffet	Pasay City	Buffet	2011	[**

LIST

restaurant_id_list = [1, 2, 3, 4, 5]
restaurant_name_list = ["Vikings Luxury Buffet", "Antonio's Restaurant", "Mesa Filipino Moderne", "Manam Comfort Filipino", "Ramen Nagi"]
restaurant_location_list = ["Pasay City", "Tagaytay", "Makati City", "Quezon City", "Various Locations"]
restaurant_cuisine_type_list = ["Buffet", "Fine Dining", "Filipino", "Filipino", "Japanese"]
restaurant_established_year_list = [2011, 2002, 2009, 2013, 2013]
restaurant_website_list = ["www.vikings.ph", "www.antoniosrestaurant.ph", "www.mesa.ph", "www.manam.ph", "www.ramennagi.com.ph"]

OBJECT

restaurant1 = {
    "id": 1,
    "name": "Vikings Luxury Buffet",
    "location": "Pasay City",
    "cuisine_type": "Buffet",
    "established_year": 2011,
    "website": "www.vikings.ph"
}

restaurant2 = {
    "id": 2,
    "name": "Antonio's Restaurant",
    "location": "Tagaytay",
    "cuisine_type": "Fine Dining",
    "established_year": 2002,
    "website": "www.antoniosrestaurant.ph"
}

restaurant3 = {
    "id": 3,
    "name": "Mesa Filipino Moderne",
    "location": "Makati City",
    "cuisine_type": "Filipino",
    "established_year": 2009,
    "website": "www.mesa.ph"
}

restaurant4 = {
    "id": 4,
    "name": "Manam Comfort Filipino",
    "location": "Quezon City",
    "cuisine_type": "Filipino",
    "established_year": 2013,
    "website": "www.manam.ph"
}

restaurant5 = {
    "id": 5,
    "name": "Ramen Nagi",
    "location": "Various Locations",
    "cuisine_type": "Japanese",
    "established_year": 2013,
    "website": "www.ramennagi.com.ph"
}

LIST OF OBJECTS

restaurants = [
    {
        "id": 1,
        "name": "Vikings Luxury Buffet",
        "location": "Pasay City",
        "cuisine_type": "Buffet",
        "established_year": 2011,
        "website": "www.vikings.ph"
    },
    {
        "id": 2,
        "name": "Antonio's Restaurant",
        "location": "Tagaytay",
        "cuisine_type": "Fine Dining",
        "established_year": 2002,
        "website": "www.antoniosrestaurant.ph"
    },
    {
        "id": 3,
        "name": "Mesa Filipino Moderne",
        "location": "Makati City",
        "cuisine_type": "Filipino",
        "established_year": 2009,
        "website": "www.mesa.ph"
    },
    {
        "id": 4,
        "name": "Manam Comfort Filipino",
        "location": "Quezon City",
        "cuisine_type": "Filipino",
        "established_year": 2013,
        "website": "www.manam.ph"
    },
    {
        "id": 5,
        "name": "Ramen Nagi",
        "location": "Various Locations",
        "cuisine_type": "Japanese",
        "established_year": 2013,
        "website": "www.ramennagi.com.ph"
    }
]

Why Are Data Structures Important?

Understanding data structures, such as lists and objects, is fundamental in programming because they provide efficient ways to organize, access, and manipulate data. Proper use of data structures leads to faster algorithms, optimized performance, and more scalable applications, which is crucial in software development.

Frontend and Backend Development Context

Frontend: Data structures are essential when dynamically displaying information on a webpage, such as student profiles or product lists. They allow the efficient rendering and interaction of data for users.
Backend: When handling data behind the scenes, such as processing requests or storing information before sending it to the frontend or a database, data structures are key to efficiently managing this information.

The Importance of Data Structures

Efficient Data Management:
Data structures allow for the easy storage, access, and modification of data. Lists (arrays) make it simple to iterate over items, while objects (dictionaries) enable quick retrieval of data using keys.
Improved Performance:
The choice of data structure has a direct impact on performance. For example, searching through a list can take time, but using a hash table (a type of object) speeds up lookups to constant time (O(1)), making applications more responsive.
Real-World Application:
Data structures are used in various real-world scenarios. For example, they manage user profiles, product listings, and other structured data in web development. Understanding lists and objects helps developers create interactive, dynamic web applications.
Foundation for Advanced Concepts:
Learning basic data structures like arrays, linked lists, and trees lays the groundwork for understanding more advanced structures and algorithms. This knowledge is crucial for improving performance, solving complex problems, and optimizing code.

Conclusion

Data structures are not just theoretical concepts; they are essential tools in practical software development. Mastering them allows developers to create applications that are faster, more responsive, easier to maintain, and scalable. Whether you're working on a small project or building a large platform, a solid understanding of data structures is critical for success in the programming world.

Activity 17: Data Structure Again

List, Object, and List of Objects

Apply the concepts of list, object, and list of objects

Object

List of Objects

Why Are Data Structures Important?

Frontend and Backend Development Context

The Importance of Data Structures

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Activity 29: HTTP Methods

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Act 21 Research OOCSS - Object-Oriented CSS

Command Palette

List, Object, and List of Objects

Apply the concepts of list, object, and list of objects

Object

List of Objects

Why Are Data Structures Important?

Frontend and Backend Development Context

The Importance of Data Structures

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