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Check if 2 nodes are mirror of each other

To check if two trees are mirror to each other, we need to compare the following conditions:
1. The left child of tree 1 should be equal to the right child of tree 2.
2. The right child of tree 1 should be equal to the left child of tree 2.
3. If both trees have no children (NULL), they are considered mirror trees.

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Prodevelopertutorial

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Lowest Common ancestor of a Binary Tree.

To calculate the lowest common ancestor in a binary tree, we can use a simple approach of listing down all the paths from the root node to the given nodes and selecting the lowest common node.
Another approach is to solve it using recursion without using any extra space. We follow a bottom-up approach and return the current node to its parent if we find one of the nodes. If the current node is not one of the nodes, we traverse the left and right children recursively.
In an example scenario, for the given nodes 'h' and 'i', the lowest common ancestor is 'b'. We start from the root node 'a' and trace the nodes down the tree until we find the desired nodes.
The algorithm returns the lowest common ancestor between the two nodes based on the recursive traversal and comparison of nodes.

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Javarevisited

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Top 5 Resume and CV Tips for Beginners and Experienced IT Professionals in 2025

Here are 5 crucial tips to make your resume better for beginners and experienced IT professionals in 2025.
1. Focus on relevant skills and experience.
2. Highlight achievements and accomplishments.
3. Tailor your resume for each job application.
4. Use a clean and professional resume format.

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Javarevisited

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10 Things Java Programmers Should Learn in 2025 [UPDATED]

2025 has been a challenging year for programmers, with numerous technological changes.
Java developers have had a busy year, with new Java versions every 6 months.
Other notable changes include Spring 6.0, Spring Security 6.0, and Spring Boot 3.
Programmers need to stay up-to-date to keep pace with the fast-changing technology landscape.

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Prodevelopertutorial

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Diameter of a Binary Tree

To find the diameter of a binary tree, we need to calculate the longest path between two leaf nodes.
The diameter can pass through the root or not. If it does, the formula is (left_height + right_height + 1).
If the diameter doesn't pass through the root, we use the formula max(left_diameter, right_diameter).
The function for finding the diameter calculates the heights and diameters of the left and right subtrees.

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Logrocket

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Building an AI agent for your frontend project

AI assistants can be incredibly useful across various domains, including ecommerce, customer support, media and content creation, marketing, education, and more.
With the right toolset, building AI agents can be both accessible and enjoyable.
BaseAI is a free and open source web AI framework for building serverless AI agents with Node.js and TypeScript, used in this tutorial.
Building an AI agent starts with choosing the right platform and tools.
This tutorial focuses on building two AI agents: a webpage FAQ generator and a RAG AI agent with memory functionalities.
This tutorial guides you through building the webpage FAQ generator AI agent that generates a selected number of FAQs based on specified topics and keywords.
RAG, or Retrieval Augmented Generation, allows you to chat with your data, and is used to add memory functionalities to the AI agent in this tutorial.
The tutorial also demonstrates how to build a simple but powerful webpage FAQ generator with AI completion responses that can be integrated into a Next.js app.
BaseAI and Langbase offer flexible customization tailored to your specific project needs and use cases for building and deploying AI agents and products.
By following this tutorial, you will have a solid understanding of building AI agents with the right toolset and platform, and with the benefits of leveraging LLMs without third-party tool limits.

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RealPython

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How to Replace a String in Python

Replacing strings in Python is a fundamental skill. You can use the .replace() method for straightforward replacements, while re.sub() allows for more advanced pattern matching and replacement.
You can replace parts of a string by chaining .replace() calls or using regex patterns with re.sub().
You replace a letter in a string by specifying it as the first argument in .replace().
You remove part of a string by replacing it with an empty string using .replace() or re.sub().
You replace all occurrences of substrings in a string by using .replace().
In this tutorial, you’ll work with a chat transcript to remove or replace sensitive information and unwanted words with emojis. To achieve this, you’ll use both direct replacement methods and more advanced regular expressions.
You’ll be playing the role of a developer for a company that provides technical support through a one-to-one text chat. You’re tasked with creating a script that’ll sanitize the chat, removing any personal data and replacing any swear words with emojis.
The first thing you’ll want to do is to take care of any swear words.
As you can see, you can chain .replace() onto any string and provide the method with two arguments. The first is the string that you want to replace, and the second is the replacement.
But there’s another swear word that’s not getting replaced because in Python, the string needs to match exactly.

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Prodevelopertutorial

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Spiral order or Zigzag traversal of a Binary Tree

Spiral order or zigzag traversal of a binary tree
The solution involves using 2 stacks
Nodes are pushed and popped alternately in the stacks
The final output is the nodes visited in spiral order

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Medium

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A Brief History of Python’s Error Messages

Python's error messages have undergone significant changes, going from frustrating and confusing, to clear, helpful and intuitive.
From Python 3.6 to Python 3.13, the error messages have become more user-friendly. Python's creator had strict guidelines for the development of Python’s error handling, known under the umbrella term exceptions.
As of Python 3.13.0, there are 37 different error types and 11 warnings types that help inform users about potential bugs or incompatibilities within their code. The exception hierarchy has changed a lot since the birth of Python.
Python 2.0 introduced the basic hierarchy of errors, making it so no error would ever pass undefined. Version 2.1 was the update to add warning classes for messages to the user that don’t kill the program.
Version 3.10 was the first update to make considerable improvements in error message reporting of errors. For 3.11, more improvements were made to the error locations in tracebacks.
The Python development team has made decisive efforts to improve error reporting to make the language even more user-friendly, intuitive and easy to use.
From data scraped from the ‘What’s New in Python’ update logs, there is a sudden increase starting with Python 3.10 compared to the rest of Python 3 updates.
The main question that arises is why there is deliberate effort to improve error messaging now. Future improvements to Python’s error messages past 3.14 are yet to be determined.
Python error messages have come a long way and will continue to evolve in the best interests of developers and users alike.
The Python community can look forward to even easier debugging with future releases and significant improvements in error reporting.

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Medium

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What’s New with Tech #2–2025

Nvidia showcased AI breakthroughs and gaming innovations at CES 2025.
Tesla revealed upgrades to its Model Y and introduced invisible display AI glasses.
Developers can expect updates on Node.js embracing TypeScript and Swift’s latest features.
MIT showcased a fresh take on training robots, and new AI-driven gadgets were unveiled.

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Prodevelopertutorial

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Height or Max depth if a BTree

The height of a binary tree is calculated by finding the number of edges on the longest path from the root to a leaf node.
Recursion can be used to calculate the height of a binary tree.
The recursion function calculates the left height and right height of each node recursively.
The maximum of the left and right heights, plus 1, gives the height of the binary tree.

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Medium

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5 Philosophical Rules for Mastering Coding

In life, the best journeys are the ones that trouble us the most.
Learning to code is like learning to walk - through trial and error.
Coding is about discovery and creation, not just writing lines of code.
Follow these philosophical rules to progress faster in your coding journey.

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Dev

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Test Scenarios vs. Test Cases: Understanding the Differences

Test scenarios are high-level descriptions of what to test, focusing on user journeys and real-world interactions with the system.
Test cases are detailed, step-by-step instructions that guide testers through specific actions to verify expected outcomes.
Test scenarios are ideal for exploratory testing, high-level planning, and situations where detailed documentation isn’t feasible.
Test cases are best suited for detailed, repeatable testing, especially in highly regulated or complex systems.
To maximize the effectiveness of test scenarios and test cases, it’s essential to follow industry best practices.
The right tools and techniques can streamline the management of test scenarios and test cases, ensuring efficiency and consistency.
Test scenarios and test cases are both indispensable tools in the tester’s toolkit, each serving unique and complementary roles.
By understanding their differences and use cases, teams can build a testing strategy that is both efficient and effective.
When used together, test scenarios and test cases ensure comprehensive test coverage, aligning technical details with real-world user experiences.
Striking the right balance between these two approaches is key to delivering high-quality software.

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Dev

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Use Chrome's Prompt API to generate a trip planner in Angular

The author of this article describes how to build a trip planner application locally using Chrome’s Built-In Prompt API and Angular.
The article explains that the Angular application calls the Prompt API to create a language model and submit queries to Gemini Nano to provide details to the user such as applying for a travel visa, clothes to pack, and attractions to visit each day.
The article explains that using Chrome’s built-in AI has zero cost since the application uses the local models in Chrome Canary.
The article provides a step-by-step guide on installing dependencies, scaffolding an Angular application, and bootstraping the language model.
The article explains that a validation logic is implemented to ensure that the Prompt API is available before displaying the user interface so users can enter texts.
The article explains that the PromptResponseComponent displays a text area where users can enter a query. This query is submitted to the internal Gemini Nano which generates a text answer.
The article defines a service layer over the Prompt API. The SystemPromptService service encapsulates the logic of the Prompt API.
The article explains that software engineers can create Web AI applications without setting up a backend server or accumulating the costs of LLM on the cloud.
The article provides a GitHub Repo and a demo for readers to learn more about the topic.

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Dev

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Dev Diaries: ShareIt

Introducing ShareIt: Your Collaborative Planning Tool!
ShareIt is a real-time collaborative planning tool built with Next.js, designed to help teams and individuals plan their projects effortlessly.
Key features include real-time collaboration, dynamic activity management, user-friendly interface, custom avatars, room creation, activity sharing, notifications and alerts, and cross-platform compatibility.
ShareIt is built using Next.js, TypeScript, Socket.io, Supabase, Tailwind CSS, and Framer Motion.

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