Use the parameter array of apply to improve the elegance and efficiency of the Code

Use the parameter array of apply to improve the elegance and efficiency of the Code

Function.apply () Tips for improving program performance

Let's start with the Math.max () function, the Math.max can be followed by any parameter, and finally the maximum value in all parameters is returned.

Like what
Alert (Math.max (5,8))//8
Alert (Math.max (5,7,9,3,1,6))//9

But in many cases, we need to find the largest element in the array.
var arr=[5,7,9,1]
Alert (Math.max (ARR))//This is not possible. It must be written like this.

function Getmax (arr) {
var arrlen=arr.length;
for (Var i=0,ret=arr[0];i<arrlen;i++) {
Ret=math.max (Ret,arr[i]);
}
return ret;
}

It's troublesome and inefficient to write. If you use apply, look at the code:
function GetMax2 (arr) {
Return Math.max.apply (Null,arr);
}
The two pieces of code achieve the same goal, but GETMAX2 is elegant, efficient, and much simpler.

Use the parameter array of apply to improve the elegance and efficiency of the Code