Trie Node Design and Initialization in DSA Javascript - Build from Scratch

Trie Node Design and Initialization

📖 Scenario: Imagine you are building a simple search feature for a phone contacts app. To do this efficiently, you want to create a special tree called a Trie that helps find names quickly by their letters.

🎯 Goal: You will create the basic building block of this Trie called a TrieNode. This node will hold letters and links to other nodes. You will set it up so it can be used to build the full Trie later.

📋 What You'll Learn

Create a class called TrieNode

Inside the class, create a constructor method

In the constructor, create a property called children that is an empty object

In the constructor, create a property called isEndOfWord and set it to false

💡 Why This Matters

🌍 Real World

Tries are used in search engines, autocomplete features, and spell checkers to quickly find words or prefixes.

💼 Career

Understanding trie node design helps in roles involving data structures, algorithms, and building efficient search or text processing systems.

1

Create the TrieNode class

Create a class called TrieNode with an empty constructor method constructor().

DSA Javascript

class TrieNode {
  constructor() {
    // Your code here
  }
}

Hint

Use the class keyword to create a class named TrieNode. Inside it, write an empty constructor() method.

2

Add the children property

Inside the constructor() of TrieNode, create a property called children and set it to an empty object {}.

DSA Javascript

class TrieNode {
  constructor() {
    // Create children property as empty object
  }
}

Hint

Use this.children = {} inside the constructor to create an empty object for child nodes.

3

Add the isEndOfWord property

Inside the constructor() of TrieNode, create a property called isEndOfWord and set it to false.

DSA Javascript

class TrieNode {
  constructor() {
    this.children = {};
    // Create isEndOfWord property and set to false
  }
}

Hint

Use this.isEndOfWord = false inside the constructor to mark the node as not ending a word yet.

4

Create an instance and print its properties

Create a variable called node and set it to a new instance of TrieNode. Then print node.children and node.isEndOfWord on separate lines.

DSA Javascript

class TrieNode {
  constructor() {
    this.children = {};
    this.isEndOfWord = false;
  }
}

// Create node instance and print properties
// Your code here

Hint

Create const node = new TrieNode(); then use console.log(node.children); and console.log(node.isEndOfWord); to print.