JavaScript Revision (Part-2): Advanced Object Concepts

In this part, we dive deeper into JavaScript objects and explore advanced concepts that will help to write more efficient and maintainable code. Let's get started!

JavaScript Revision (Part-2): Advanced Object Concepts

In this part, we dive deeper into JavaScript objects and explore advanced concepts that will help to write more efficient and maintainable code. Let's get started!

Singleton Objects:

• A singleton object ensures that a class has only one instance and provides a global point of access to it.

Object Literals:

• Simple syntax for creating objects using curly braces.

Methods of Accessing Objects:

• Dot notation and bracket notation.

Symbols:

- Unique and immutable data type used to create unique property keys.

Preventing Object Modification:

- Object.freeze(): Prevents modification of existing properties and prevents new properties from being added.

Function Calls by Reference and Value:

- Passing objects by reference allows modification of the original object.

Using this Keyword:

- Refers to the object from which the method was called.

Combining Objects:

- Object.assign() and spread operator (`...`) to merge objects.

Using Object.entries, Object.keys, and Object.values:

- Object.entries(): Returns an array of a given object's key-value pairs.

- Object.keys(): Returns an array of a given object's property names.

- Object.values(): Returns an array of a given object's values

Checking if a Key Exists:

- hasOwnProperty(): Checks if the object has the specified property as its own property.

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