Day 24: Increment and decrecemt, Object

javascript/Day23/index.js

@@ -69,7 +69,7 @@ if (null) {
   console.log("false");
 }
 
-var number = -1;
+var number = 1;
 
 var result = Boolean(number);
 var result = String(number);

javascript/Day24/index.js

@@ -0,0 +1,155 @@
+var x = 1;
+
+var y = ++x + x++;
+
+console.log(y, x);
+
+var x = 0;
+
+var y = x++ + 2 + x;
+
+console.log(y, x);
+
+var a = 1;
+var b = 2;
+
+var c;
+var d;
+
+c = ++b;
+
+d = a++;
+
+c++;
+
+b++;
+
+++a;
+
+console.log(a, b, c, d);
+
+//a =3, b=4,c=4,d=1
+
+var x = 10;
+
+var y = x-- + x--;
+
+console.log(x, y);
+
+var x = 3;
+
+var y = --x + --x + x++;
+
+console.log(x, y);
+
+var obj = {
+  name: "utkarsh",
+  age: 24,
+  city: "Agra",
+  isAdult: true,
+};
+
+console.log(obj);
+var city = obj.city;
+
+console.log(city);
+console.log(obj["name"]);
+obj.city = "Delhi";
+
+console.log(obj);
+
+var obj = {
+  name: "utkarsh",
+  age: 24,
+  isAdult: true,
+  addresses: {
+    primary: {
+      flatNo: "",
+      street: "",
+      landmark: "",
+      state: "",
+      pincode: "",
+      country: "",
+      city: "",
+    },
+    secondary: {
+      flatNo: "",
+      street: "",
+      landmark: "",
+      state: "",
+      pincode: "",
+      country: "",
+      city: "",
+    },
+  },
+};
+
+var obj = {
+  name: "utkarsh",
+  age: 24,
+  isAdult: true,
+  father: {
+    name: "Gandhi Ji",
+    age: 65,
+  },
+  mother: {
+    name: "Indira Gandhi",
+    age: 40,
+  },
+
+  getName: function () {
+    console.log("Utkarsh");
+  },
+};
+
+obj.getName();
+var obj2 = null;
+//if you try to access the property which is not defined inside an existing object, you get undifined.
+
+console.log(obj.sister.isAdult);
+
+var user = {
+  name: "utkarsh",
+  age: 24,
+  city: "Agra",
+  isAdult: true,
+};
+
+console.log(user);
+
+if (user.isAdult) {
+  delete user.isAdult;
+} else {
+  console.log("User is not an Adult");
+}
+console.log(user);
+
+var allValues = Object.values(user);
+
+console.log(allValues);
+var allKeys = Object.keys(user);
+
+console.log(allKeys);
+
+var obj2 = new Object(obj);
+
+console.log(obj2);
+
+var obj = {
+  name: "Utkarsh",
+};
+
+var obj2 = new Object();
+//obj2={}
+var obj2 = new Object(obj);
+//obj2={name:"Utkarsh"}
+
+var obj3 = Object.create(null);
+//obj3= {}
+
+var obj3 = Object.create(obj);
+//obj3={}, but you can access obj3.name
+console.log(obj3);
+
+Object.freeze(obj);
+//can not update value after freezing