add all 85 array destructor till line no 75

coder-harsh · coder-harsh · commit e9e09a25010e · 2023-03-24T16:14:34.000+05:30
diff --git a/85-array-destructing.html b/85-array-destructing.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Array destructing</title>
+    <link rel="stylesheet" type="text/css" href="">
+</head>
+
+<body>
+    <h1>array destructor</h1>
+    <script src="js/85-array-destructing.js"></script>
+</body>
+
+</html>
diff --git a/js/85-array-destructing.js b/js/85-array-destructing.js
@@ -0,0 +1,75 @@
+/*
+let book = ["ADV. JS", 200, 150];
+console.log(book[0]); //ADV. JS
+console.log(book[1]); //200
+
+pahle hum array element ko aise access krte the.
+
+
+//hum ab chahte hain ki har element ko ek alag variable se access kare
+
+let book = ["ADV. JS", 200, 150];
+
+let name = book[0];
+let pages = book[1];
+let price = book[2];
+console.log(name); //ADV. JS
+console.log(pages); //200
+console.log(price); //150
+
+
+//isi ka ek shotcut h array destructing
+let book = ["ADV. JS", 200, 150];
+
+let [name, pages, price, publication] = book; //array destructor ko initialize karna mandatory h. agar array ka 10 value v hota to destuctring s aasani se kar sakte hain.
+console.log(name); //ADV.JS
+console.log(pages);  //200
+console.log(price);  //150
+console.log(publication);  //undefined error nhi dega but agar variable ka value nhi rahe to undefined store kar dega. i.e publication blank rahega.
+
+
+let book = ["ADV. JS", , 200, 150];
+//hum bich m v blank kr sakte hain value
+let [name, pages, price, publication] = book;  // hum publication ko bich m v rakh sakte hain.
+console.log(name);  //ADV. JS
+console.log(pages);  //undefined bcs pages is blank
+console.log(price); //200
+console.log(publication); //150
+
+
+//extra variable ka name dalenge but value nhi hoga toh wo undefined ho jaygea
+
+
+
+//balnk/undefined value k liye ek default value  v hota h.
+let book = ["ADV. JS", 600, 200, 150];
+let [name, pages = 500, price, publication] = book;   //hum pages m default value string store is trh se karenge. pages="hii"
+
+//console.log(pages);  //default value 500 agar pages ka value na rahe to.
+console.log(pages); //600
+
+
+//nested array
+
+let book = ["ADV. JS", 100, 200, ["Tech Gun", 2021]];  //nested array
+let [name, pages, price, [Publication, Year]] = book;
+
+console.log(Publication);  //Tech Gun
+console.log(Year);  //2021
+*/
+
+
+//iska actual use kh p h
+
+
+function book() {
+    //do something
+    return ["Adv js", 200];
+}
+
+//let name = book(); //isko hum normal var m na store karke array destructor karte hain.
+//console.log(name);  //(2) ['Adv js', 200]
+
+let [booktitle, price] = book();
+console.log(booktitle);  //Adv js
+console.log(price);  //200
