Advanced-Web-Technology

Assignment No - 1

Write a ECMA Script program that will return 1 if the array is sorted in ascending order,-1 if it is sorted in descending order or 0 if it is not sorted.

function checkArrayOrder(arr) { // Check for ascending order if (arr.every((element, index, array) => index === 0 || element >= array[index - 1])) { return 1; }

// Check for descending order
if (arr.every((element, index, array) => index === 0 || element <= array[index - 1])) {
  return -1;
}


return 0;

}

const ascendingArray = [1, 2, 3, 4, 5]; const descendingArray = [5, 4, 3, 2, 1]; const unsortedArray = [3, 1, 4, 2, 5];

console.log(checkArrayOrder(ascendingArray)); // Output: 1 console.log(checkArrayOrder(descendingArray)); // Output: -1 console.log(checkArrayOrder(unsortedArray)); // Output: 0

Assignment No - 2 Write a ECMAScript program to convert an asynchronous function to return a promise.

console.log("line 1") let promise = new Promise((resolve,reject)=>{ let str1="hi"; let str2="hi"; setTimeout(()=>; { if(str1 === str2){ resolve("success"); } else{ reject("failed"); } },2000) });

promise.then((message)=>;{ console.log("My self Mayuri"); }) .catch((message)=>{ console.log("completed"); }); console.log("line2"); console.log("line3")

output: line 1 line2 line3 My self Mayuri

Assignment No :- 3

Title :- Read & Write File in Node.js

const file=require('fs'); const write=()=>{ file.writeFile("test.txt","new updated content",err=>{ if(err){ console.log(err); } else{ console.log("success"); } }) }

const read=()=>{ file.readFile("test.txt",(err,data)=>{ if(err){ console.log(err); } else{ console.log(data.toString()); } }) } const append=()=>{ file.appendFile("test.txt","append",(err,data)=>{ if(err){ console.log(err); } else{ console.log("success"); } }) } write(); read(); append();

Assignment No - 4

Const express = require('express'); const app = express();

app.get('/',(req,res)=>{ res.send("welcome to MCA"); }); app.listen(4000,()=>{ console.log("Listen to port 4000") });