The best value of the array of JS face questions

Today continue to share JS common face questions, to find the maximum value of the array, the minimum value, here are listed 4 common solutions, there are other methods can also be achieved, the reader know can be a private messages to me, I will list the comments to the blog, welcome suggestions.

First, sort by array

 1  var  Arr=[3,4,5,1,2,9,8,7];  2  var  newarr=arr.sort (function   (A, b) { 3  return  a-B;  4  })  5  var  min=newarr[0];  6  var  max=newarr[arr.length-1 7  8   Console.log (min);  9  console.log (max); 

The second, using the Eval method (not recommended, may result in malicious code execution)

1 var arr=[3,4,5,1,2,9,8,7]; 2 var min=eval ("Math.min (" +arr.tostring () + ")"); 3 var max=eval ("Math.max (" +arr.tostring () + ")"); 4 5 console.log (min); 6 Console.log (max);

The third, the hypothesis method (learned C language know)

1 var min=arr[0],max=arr[0]; 2 3  for (var i = 0; i < arr.length; i++) {4     arr[i]>max?max=arr[i]:null; 
    5     arr[i]<min?min=arr[i]:null; 6 }78console.log (min); 9 Console.log (max);

The fourth kind, skillfully uses apply (old driver solution)

1 var arr=[3,4,5,1,2,9,8,7]; 2 3 var min=math.min.apply (null, arr); 4 var max=math.max.apply (null, arr); 5 6 console.log (min); 7 Console.log (max);

The best value of the array of JS face questions