JavaScript Data Structures

1. Introduction and Prerequisites

Get a clear roadmap of what's to come, understand the prerequisites, and learn valuable tips to set you up for success as you delve into objects, arrays, and essential programming concepts.

Introduction to the Course

Prerequisites for the Course

What Will Be Covered

Tips for Success

2. Objects Fundamentals

Explore the core concepts of JavaScript objects. This section covers the fundamentals of object creation, property management, and method implementation.

Understanding Objects

Object Creation

Nested Properties

Challenge: Creating an Object

Accessing Object Properties

Challenge: Accessing Object Properties

Working with Properties

Challenge: Modifying and Extending Object

Object Methods

Properties in Methods

Challenge: Working with Object Methods

Object Fundamentals Sum Up

3. Advanced Object Manipulation

Dive into advanced techniques for working with JavaScript objects. This section delves into various strategies to efficiently manipulate and interact with objects.

Object Iteration with for...in Loop

Challenge: Object Property Explorer

Method hasOwnProperty()

Challenge: hasOwnProperty() for Object Property Iteration

Spread Operator

Challenge: Merging Objects and Adding Properties

Object Destructuring

Challenge: Destructuring

Advanced Object Manipulation Sum Up

4. Mastering Arrays

Embark on a journey into the JavaScript arrays. This section provides a strong foundation for creating arrays, managing elements, and executing basic array operations.

Understanding Arrays

Challenge: Array Element Accessor

Working with Array Elements

Challenge: Array Element Modifier

for Loop

Challenge: Array Element Iteration

for...of Loop

Challenge: Iteration with for...of

Mastering Arrays Sum Up

5. Advanced Array Operations

Master the advanced array manipulation skills, covering various techniques and methods for handling arrays effectively in multiple scenarios.

map() Method

Challenge: Array Element Transformation

filter() Method

Challenge: Filtering Students by Exam Scores

find() Method

Challenge: Discovering Featured Products

sort() Method

Challenge: Sorting and Extracting Properties

Advanced Array Operations Sum Up

Course Sum Up

Зміст курсу

JavaScript Data Structures

1. Introduction and Prerequisites

Introduction to the Course Prerequisites for the Course What Will Be Covered Tips for Success

2. Objects Fundamentals

Understanding Objects Object Creation Nested Properties Challenge: Creating an Object Accessing Object Properties Challenge: Accessing Object Properties Working with Properties Challenge: Modifying and Extending Object Object Methods Properties in Methods Challenge: Working with Object Methods Object Fundamentals Sum Up

3. Advanced Object Manipulation

Object Iteration with for...in Loop Challenge: Object Property Explorer Method hasOwnProperty()Challenge: hasOwnProperty() for Object Property Iteration Spread Operator Challenge: Merging Objects and Adding Properties Object Destructuring Challenge: Destructuring Advanced Object Manipulation Sum Up

4. Mastering Arrays

Understanding Arrays Challenge: Array Element Accessor Working with Array Elements Challenge: Array Element Modifier for Loop Challenge: Array Element Iteration for...of Loop Challenge: Iteration with for...of Mastering Arrays Sum Up

5. Advanced Array Operations

map() Method Challenge: Array Element Transformation filter() Method Challenge: Filtering Students by Exam Scores find() Method Challenge: Discovering Featured Products sort() Method Challenge: Sorting and Extracting Properties Advanced Array Operations Sum Up Course Sum Up

find() Method

Let's explore the find() method, including its syntax and applications, with concrete examples to illustrate its functionality.

find()

While the filter() method sifts through an array to uncover all elements meeting a condition, the find() method is tailor-made for a singular mission – discovering and retrieving the first matching element. Here's a closer look at its syntax:

Let's unravel the critical characteristics of the find() method:

The original array remains unaltered;
It navigates through the array, scrutinizing each element;
The method halts upon locating the initial match, returning that specific element;
Without a matching element, the method returns undefined.

Find a Task by Order

In this example, the 'find()' method retrieves the task by the 'order' key.


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const tasks = [
  { order: 1, name: "Buy groceries" },
  { order: 2, name: "Walk the dog" },
  { order: 3, name: "Read a book" },
];

const firstTask = tasks.find((element) => element.order === 1);
console.log("First task:", firstTask.name); // Output: First task: Buy groceries

const secondTask = tasks.find((element) => element.order === 2);
console.log("Second task:", secondTask.name); // Output: Second task: Walk the dog

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