How do I get the second largest element from an array in javascript [closed]

Answer 1

The simplest solution is to sort :

// here's your array :
var stringArray = new Array('20','120','111','215','54','78');

// let's convert it to a real array of numbers, not of strings :
var intArray = stringArray.map(Number);

// now let's sort it and take the second element :
var second = intArray.sort(function(a,b){return b-a})[1]; 

If you don't want the simplest but the fastest (you probably don't need it), then you'd have to write your for loop and store the two greatest elements while looping.