# bind in JS

### Function.prototype.bind() 

 The bind() method returns a new function that, when called, 
 - has its this keyword set to the provided value,  **with a given sequence of arguments preceding any provided when the new function is called.**

### What's here for us to learn this bind method: 
1) How it sets the this keyword for the returned function .
2) How it arranges the arguments while calling returned function. [**Pre Configuring the function arguments**]


- How arguments are arranged by bind() method:

 > Whatever arguments we provide in the **bind(this,args)** methods those will be precded by other additional arguments that we provide while calling the returned function.

Ex:


```
function Combine(Showresult,Optype,args)
{
let sum=args;
let res=0;
console.log(sum);
for(elememt of sum)
{
  if(Optype=="ADD")
res+=elememt;

if(Optype=="SUB")
res-=elememt;

}

Showresult(res);

}

function Showresult(MesgText,res)
{

 console.log(MesgText+res);

}

Combine(Showresult.bind(this,"this addtion is "),"ADD",[7,9,6,5,8,9]);

Combine(Showresult.bind(this,"this substraction is "),"SUB",[7,9,6,5,8,9]);


```