JavaScript Dict - JavaScript

Introduction

JavaScript Dict is a built-in JavaScript constructor function that represents a dictionary or an associative array. It allows you to store key-value pairs and retrieve the corresponding value by referencing the key. This data structure is widely used to organize and manipulate data in JavaScript applications.

Creating a Dictionary

To create a new dictionary, you can simply use the new keyword along with the Dict constructor function:

let dict = new Dict();

Adding Key-Value Pairs

You can add key-value pairs to the dictionary using the set method. The key can be a string or a number, and the value can be any JavaScript object.

dict.set("name", "John");
dict.set("age", 30);
dict.set("isStudent", true);

Accessing Values

To retrieve the value associated with a specific key, you can use the get method:

let name = dict.get("name");
console.log(name);  // Output: John

Checking Key Existence

You can check if a key exists in the dictionary using the has method:

if (dict.has("age")) {
    console.log("Age is available in the dictionary.");
} else {
    console.log("Age is not found in the dictionary.");
}

Removing Key-Value Pairs

To remove a key-value pair from the dictionary, you can use the delete method:

dict.delete("isStudent");

Getting All Keys

To retrieve an array of all keys in the dictionary, you can use the keys method:

let keys = dict.keys();
console.log(keys);  // Output: ["name", "age"]

Getting All Values

To retrieve an array of all values in the dictionary, you can use the values method:

let values = dict.values();
console.log(values);  // Output: ["John", 30]

Clearing the Dictionary

You can remove all key-value pairs from the dictionary using the clear method:

dict.clear();

Conclusion

JavaScript Dict provides a convenient way to work with key-value pairs in JavaScript. Its simplicity and ease of use make it an essential tool for organizing and manipulating data in JavaScript applications.