Design a data structure that works like a LRU Cache. Here cap denotes the capacity of the cache and Q denotes the number of queries. Query can be of two types:

PUT x y: sets the value of the key x with value y
GET x: gets the value of key x if present else returns -1.
The LRUCache class has two methods get() and put() which are defined as follows.

get(key): returns the value of the key if it already exists in the cache otherwise returns -1.
put(key, value): if the key is already present, update its value. If not present, add the key-value pair to the cache. If the cache reaches its capacity it should remove the least recently used item before inserting the new item.
In the constructor of the class the capacity of the cache should be initialized.

Given a string s, which may contain duplicate characters, your task is to generate and return an array of all unique permutations of the string. You can return your answer in any order.

Implement the function power(b, e), which calculates b raised to the power of e (i.e. b^e).

🖤🕯️

The n-queens puzzle is the problem of placing n queens on a (n × n) chessboard such that no two queens can attack each other. Note that two queens attack each other if they are placed on the same row, the same column, or the same diagonal.

Given an integer n, find all distinct solutions to the n-queens puzzle.
You can return your answer in any order but each solution should represent a distinct board configuration of the queen placements, where the solutions are represented as permutations of [1, 2, 3, ..., n]. In this representation, the number in the ith position denotes the row in which the queen is placed in the ith column.
For eg. below figure represents a chessboard [3 1 4 2].

Completed 77 Day Of Coding ✨🎉

New Junior Developers Can’t Actually Code??

https://nmn.gl/blog/ai-and-learning

→ First Install Node.JS in your system, if you don't have node.js!
Check This Post for Node installation (Note: Install only node, not tailwind)

npm install figlet

let figlet = require('figlet');
let input = process.argv.slice(2).join(' ');

figlet(input, function (err, data) {
  if (err) {
    console.log("Something went wrong...");
    console.dir(err);
    return;
  }
  console.log(data);
});

node index.js "Your Text"

@NotCoding | @CodesSnippet

महाशिवरात्रि की हार्दिक शुभकामनाएं ❤️🙇‍♂

Source - ByteByteGo 👾

Yes, We won ❤️🥀🇮🇳😭

होली की हार्दिक शुभकामनाएं ✨ ❤️

› So, What is Authentication and why we need it?
Basically, In simple words Authentication is the process of verifying the identity of a user or client before giving access to API routes, data, or features in a web API.

› For This we need node.js installed in our Local Mechine / Server, If don't have installed that checkout this post for step by step node installation (NOTE: Only Install Node.js Part).

npm init -y

npm install express

npm i express

const express = require("express");
const app = express(); // defining express

// it need to define request header at every api call
const auth = (req, res, next) => {
    let {token} = req.headers;
    if (token === "giveAccess") { // give your custom token value by removing "giveAccess" (Suggested: use some uuid key)
        console.log("Login Successful");
        next();
    } else {
        res.send({error: "Access Denied"});
    }
};

// Example route, define your specific route to implement
app.get("/api", auth, (req, res) => {
    res.send({message: "Access Granted"});
});

NOTE: This is basic Authentication way to implement it, not recommended in major and production level projects, it's only for your personal projects, API's etc.

› Please Welcome: @ChikuXBot

@NotCoding | @CodesSnippet

requests.get("http://localhost:3010/api")

{
  'error': 'Access Denied'
}

requests.get("http://localhost:3010/api", headers={"token": "giveAccess"})

{
  'message': 'Access Granted'
}

रामनवमी की हार्दिक शुभकामनाएं ✨❤️

Got it mate!!