meanbatchmayreg/code.log at master · Nishant-Bansal/meanbatchmayreg · GitHub

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function show(){
console.log("I am a function ");
}
undefined
show();
VM324:2 I am a function
undefined
var test = function(){
console.log("I am a Function Expression or Anonymous Function ");
}
undefined
typeof test;
"function"
test();
VM442:2 I am a Function Expression or Anonymous Function
undefined
typeof show;
"function"
x = 1000;
1000
typeof x;
"number"
if(typeof (x) =='number'){
}
undefined
if(typeof (x) =='number'){
console.log('x is a number ');
}
VM582:2 x is a number
undefined
if(typeof (x) =='function'){
console.log('x is a number ');
}
undefined
if(typeof (x) =='function'){
console.log('x is a function ');
}
undefined
typeof x;
"number"
show;
ƒ show(){
console.log("I am a function ");
}
typeof show;
"function"
x = show;
ƒ show(){
console.log("I am a function ");
}
x;
ƒ show(){
console.log("I am a function ");
}
typeof x;
"function"
if(typeof (x) =='function'){
console.log('x is a function ');
}
VM693:2 x is a function
undefined
z = 1000;
1000
r = "1000"
"1000"
x==z;
false
z==r;
true
x===z;
false
z===r;
false
function calc(){
var add = function(x, y){
return x + y;
}
var sub = function(){
	return x - y;
}
return [add,sub];
}
undefined
var t = calc();
undefined
t;
(2) [ƒ, ƒ]0: ƒ (x, y)1: ƒ ()length: 2__proto__: Array(0)
function calc(){
var add = function(x, y){
return x + y;
}
var sub = function(x,y){
	return x - y;
}
return [add,sub];
}
undefined
var t = calc();
undefined
t;
(2) [ƒ, ƒ]0: ƒ (x, y)1: ƒ (x,y)length: 2__proto__: Array(0)
t[0]
ƒ (x, y){
return x + y;
}
t[0]();
NaN
t[0](100,200);
300
t[1](10,20);
-10
calc()[0](10,20);
30
function calc(){
var add = function addition(x, y){
return x + y;
}
var sub = function subtraction(x,y){
	return x - y;
}
return [add,sub];
}
undefined
var t = calc();
undefined
t;
(2) [ƒ, ƒ]0: ƒ addition(x, y)1: ƒ subtraction(x,y)length: 2__proto__: Array(0)
t[0]();
NaN
t[0](10000,2000);
12000
function calc(){
var add = function (x, y){
return x + y;
}
var sub = function (x,y){
	return x - y;
}
return {'addition':add,'subtraction':sub};
}
undefined
var t = calc();
undefined
t;
{addition: ƒ, subtraction: ƒ}
typeof t;
"object"
t.addition(100,200)
300
var ram = {id:1001, name:'Ram ', marks:90};
undefined
var shyam = {id:1002, name:'Shyam'};
undefined
ram;
{id: 1001, name: "Ram ", marks: 90}
shyam;
{id: 1002, name: "Shyam"}
typeof ram;
"object"
typeof shyam;
"object"
ram instanceof Object;
true
shyam instanceof Object;
true
ram;
{id: 1001, name: "Ram ", marks: 90}
ram.award = "2019";
"2019"
ram;
{id: 1001, name: "Ram ", marks: 90, award: "2019"}
ram.job = "IT";
"IT"
ram;
{id: 1001, name: "Ram ", marks: 90, award: "2019", job: "IT"}
shyam;
{id: 1002, name: "Shyam"}
delete ram.job;
true
ram;
{id: 1001, name: "Ram ", marks: 90, award: "2019"}
var m = [10,20,30,40,50];
undefined
typeof m;
"object"
m instanceof Array;
true
typeof Array;
"function"
m instanceof Object;
true
var add = (x,y)=>x+y;
undefined
var addition = function (x,y){
return x + y;
}
undefined
typeof add;
"function"
add(10,20);
30
var add1 = (x,y)=>{
console.log('X is '+x+' And Y is '+y);
return x + y;
}
undefined
add1(1000,200);
VM1908:2 X is 1000 And Y is 200
1200