Category Archives: ANDROID

In Flutter development, organizing your UI code efficiently can make a big difference in how readable and maintainable your app becomes. A popular strategy developers use is breaking large widget trees into smaller methods within the same class. But does this practice actually help with performance? Let’s explore the pros and cons of using component methods in… Read More »

Command-line tools are the backbone of any productive development workflow. Whether you’re developing mobile apps with Flutter or backend logic with Dart, having a strong grip on CLI commands will speed up your tasks and automate your builds. Here’s a fully updated, concise guide covering all essential Flutter and Dart CLI commands. Flutter CLI… Read More »

When working with layouts in Flutter, especially in overlapping scenarios, the Stack widget becomes your go-to choice. But within it, two powerful children stand out: Align and Positioned. Although they might seem to do similar things, their differences can significantly affect your layout behavior. Let’s walk through a new set of examples and explanations to better understand how these two… Read More »

Flutter provides a robust and flexible toolkit to build beautiful and high-performing UIs for both Android and iOS applications. One of the widgets that help developers create intuitive and interactive UI components is the Dismissible widget. In this article, we’ll dive into the core functionality of the Dismissible widget, how it works, and how you… Read More »

Introduction A well-designed image carousel can greatly enhance the user experience in Flutter apps. In this article, we will create a **beautiful and interactive image slider** using **CarouselController**. We’ll add smooth animations, navigation buttons, and loading indicators to improve usability. Prerequisites To follow along, make sure you have Flutter installed. If you haven’t set it… Read More »

Video Tutorial Here is the first part of best practices in Flutter… 1. Placeholder Widgets Use SizedBox instead of Container as Placeholder widgets. Take a look at the below use-case The SizedBox is a const constructor and creates a fixed-size box. The width and height parameters can be null to indicate that the size of the box should not… Read More »

Wrap widget is such a useful widget in many circumstances. Here we will learn about different types of Chip Widgets such as & Wrap Widgets Watch Video Tutorial First Let’s create a simple Chip Widget. Widget chip(String label, Color color) { return Chip( labelPadding: EdgeInsets.all(5.0), avatar: CircleAvatar( backgroundColor: Colors.grey.shade600, child: Text(label[0].toUpperCase()), ), label: Text( label, style:… Read More »

This post provides a step-by-step guide to implementing a carousel slider in Flutter using a custom CarouselView widget. The code demonstrates how to display a horizontal carousel of images with various customization options. Demo Full code Example import ‘package:flutter/material.dart’;List<String> images = [ “https://images.unsplash.com/photo-1503376780353-7e6692767b70”, “https://images.unsplash.com/photo-1577714141096-bf2b9e69500a”, “https://images.unsplash.com/photo-1542362567-b07e54358753”, “https://images.unsplash.com/photo-1511407397940-d57f68e81203”, “https://images.unsplash.com/photo-1659671026913-b7e632f17395”];class Home extends StatefulWidget { const Home({super.key}); @override State<Home>… Read More »

A ternary search tree is a trie-like data structure where each node may have up to three children. Here is an example which represents the words code, cob, be, ax, war, and we.        c     /  |  \    b   o   w  / |   |   | a … Read More »

Feature OpenAI o1 Google Gemini 2.0 xAI Grok-2 Meta Llama 3.3 Nvidia Nemotron-4 340B Developer OpenAI Google xAI (Elon Musk’s startup) Meta Nvidia Release Date December 2024 December 2024 December 2024 December 2024 December 2024 Key Focus Problem-solving, STEM, competitive programming Efficiency, advanced reasoning Integration with X (formerly Twitter) Open research, accessible to developers Open… Read More »

Flutter 3.27, released in December 2024, introduces several enhancements across the framework, engine, and developer tools, aiming to improve performance, user interface components, and the overall development experience. Framework Enhancements: • Cupertino Widget Updates: Significant improvements have been made to Cupertino widgets to better align with iOS design standards: • CupertinoCheckbox and CupertinoRadio: Enhanced sizes,… Read More »

In Flutter, Streams are a powerful way to handle asynchronous data like file downloads. When downloading a file, streams can help you process chunks of data in real time, making it easy to show progress to the user. Here’s a step-by-step guide on how to download a file using streams in Flutter. Add Required Dependencies… Read More »

A step word is formed by taking a given word, adding a letter, and anagramming the result. For example, starting with the word “APPLE”, you can add an “A” and anagram to get “APPEAL”. Given a dictionary of words and an input word, create a function that returns all valid step words. To solve the… Read More »

Watch Video Tutorial Using Simple Timer Create a simple debouncer class Implementation: Using ValueNotifier Implementation: Using “Simple Debouncer” package First Add easy_debouncer package in your dependencies https://pub.dev/packages/easy_debounce Source Code https://github.com/MrVipinVijayan/flutter_tutorials/tree/feat/debounce

To find the minimum element in a rotated sorted array in O(log⁡N)O(\log N)O(logN) time, you can use a modified binary search approach. The key observation is that even though the array is rotated, one part of the array will still be in sorted order. By comparing elements in the middle of the array with the… Read More »

The word can be constructed from letters of sequentially adjacent cell, where “adjacent” cells are those horizontally or vertically neighboring. The same letter cell may not be used more than once. For example, given the following board: exists(board, “ABCCED”) returns true, exists(board, “SEE”) returns true, exists(board, “ABCB”) returns false. Python def exist(board, word):    if not board:        return False   … Read More »

The first few sevenish numbers are 1, 7, 8, 49, and so on. Create an algorithm to find the nth sevenish number. JAVA JAVASCRIPT

For example, given [100, 4, 200, 1, 3, 2], the longest consecutive element sequence is [1, 2, 3, 4]. Return its length: 4. Algorithm should run in O(n) complexity. JAVA JAVASCRIPT PYTHON

Recall that a heap has the following operations: To implement a stack using only a heap, you can use a max heap and maintain a counter to ensure that the order of elements is preserved. Here’s an example implementation in Python, Java, and JavaScript using the heapq module (Python), PriorityQueue (Java), and BinaryHeap (JavaScript): Python:… Read More »

For example, given the following preorder traversal: [a, b, d, e, c, f, g] And the following inorder traversal: [d, b, e, a, f, c, g] You should return the following tree: To reconstruct a binary tree from its pre-order and in-order traversals, you can use a recursive approach. The idea is to select the… Read More »