Category Archives: ANDROID

Video Tutorial Lets understand this with an example we are going to create a basic counter example here using bloc and cubit. Here are the key differences between Bloc and Cubit in Flutter: Both Bloc and Cubit are part of the broader Flutter Bloc library and adhere to the principles of reactive programming. Your choice… Read More »

Given a string, return the length of the longest palindromic subsequence in the string. For example, given the following string: MAPTPTMTPA Return 7, since the longest palindromic subsequence in the string is APTMTPA. Recall that a subsequence of a string does not have to be contiguous! Your algorithm should run in O(n^2) time and space.… Read More »

insert(key: str, value: int): Set a given key’s value in the map. If the key already exists, overwrite the value. sum(prefix: str): Return the sum of all values of keys that begin with a given prefix. For example, you should be able to run the following code: mapsum.insert(“columnar”, 3) assert mapsum.sum(“col”) == 3 mapsum.insert(“column”, 2)… Read More »

Python Java Javascript These implementations use the Morris Traversal algorithm to perform in-order traversal without using any additional space other than O(1). The algorithm establishes temporary links between nodes and their predecessors, allowing efficient traversal and processing of the tree nodes. Note: The code examples assume that the tree nodes have a val, left, and… Read More »

Given an absolute pathname that may have . or .. as part of it, return the shortest standardized path. For example, given “/usr/bin/../bin/./scripts/../”, return “/usr/bin/”. To obtain the shortest standardized path from an absolute pathname that may contain “.” or “..” as part of it, you can follow these steps: Here’s an example Python code… Read More »

In this example, we create a simple Flutter application that displays a counter and increments the count when a FloatingActionButton is pressed. The state management is handled by Riverpod. Here’s a breakdown of the code: When you run this code, you will see a simple app with an app bar, a counter in the center… Read More »

The game ends either when one player creates a line of four consecutive discs of their color (horizontally, vertically, or diagonally), or when there are no more spots left in the grid. Design and implement Connect 4. To design and implement Connect 4, we can follow these steps: Here’s an example implementation of Connect 4… Read More »

Given a number in Roman numeral format, convert it to decimal. The values of Roman numerals are as follows: { ‘M’: 1000, ‘D’: 500, ‘C’: 100, ‘L’: 50, ‘X’: 10, ‘V’: 5, ‘I’: 1 } In addition, note that the Roman numeral system uses subtractive notation for numbers such as IV and XL. For the… Read More »

We say a number is sparse if there are no adjacent ones in its binary representation. For example, 21 (10101) is sparse, but 22 (10110) is not. For a given input N, find the smallest sparse number greater than or equal to N. Do this in faster than O(N log N) time. Solution in Java… Read More »

This article shows how to implement Bottom navigation using Tabs in Flutter.     Watch Video Tutorial     For that we need to have a TabController and a TabBarView Widget.   Create Tabs   This is our demo tab layout widget. Create a new file name FirstTab.dart and copy the contents into it. You… Read More »