todaycodes.txt

var obj = {a:100, b:200}
var t = {a:9999,w:88,d:'Hello'};
var m = {...obj,...t}
var nnn = 10000;
var b = {nnn};
var w = {
m:()=>{
console.log("M is ",this);
}
}
var w = {
m:function(){
console.log("M is ",this);
}
}
w.m();
window
this

window == this;

var obj = {
arr : [10,20,9,11,44,76,13,91],
evenArr:[],
evenOdd(){
var that = this;
	this.arr.forEach(function(ele){
		if(ele%2==0){
        	that.evenArr.push(ele);
		}
    })
}
/*evenOdd:function(){
}*/
}

var obj = {
arr : [10,20,9,11,44,76,13,91],
evenArr:[],
evenOdd(){

	this.arr.forEach((ele)=>{
		if(ele%2==0){
        	this.evenArr.push(ele);
		}
    })
}
/*evenOdd:function(){
}*/
}
obj.evenArr.length=0;
obj.evenArr

const a = {};
a.e = 100;
a.n = "Hello";
for(let key in a){
console.log('Key is ',key);
}
a.b;
a["b"]
for(let key in a){
console.log('Value is ',a[key], " Key is ",key);
}
for(let key in a){
delete a[key]
//console.log('Value is ',a[key], " Key is ",key);
}
var obj = {};
obj instanceof Window;
obj instanceof Object;
arr instanceof Array;
arr instanceof Object;
window instanceof Window;
window instanceof Object;
var arr = [10,20,30,50];
var arr2 = [1,2,3,4];
var t = arr + arr2;
var n = [arr,arr2];
var n = [...arr,...arr2];
function show(){
console.log(" I am SHow ",arguments.length);
}
function show(...a){
console.log(" I am SHow ",a.length);
}
show();
show(10);
function test(x=10,y=20){
console.log('X is ',x,' And Y is ',y);
}
function test(x,y){
console.log('X is ',x,' And Y is ',y);
x = x || 10;
y = y || 20;
console.log('X is ',x,' And Y is ',y);
}
test();
test(1000,2000);