JS: Check for most repeating number in array

Question

So let's say I have a two arrays which consists of numbers.

var arr1 = [1,2,3,4,5];
var arr2 = [1,1,1,4,4,5,5,2];

Is it possible to compare this two arrays in order to get most repeated number in two of them (for this example this number would be "1")? There could be any numbers of any value in arrays.

possible duplicate of [Get the element with the highest occurrence in an array](http://stackoverflow.com/questions/1053843/get-the-element-with-the-highest-occurrence-in-an-array) — Jordi Castilla, May 25 '15 at 09:49

Newinjava · Answer 1 · 2015-05-25T10:37:28.660

Try this

        function maxAppearedNos()
        {
            var arr1 = [1,2,3,4,5,2,2,2,2,2,2,2,2];
            var arr2 = [1,1,1,4,4,5,5,2];
            var concatenatedArray = arr1.concat(arr2); 
            var macCountNos = getMaxAppearedNos(concatenatedArray);
        }

        function getMaxAppearedNos(array)
        {
            if(array.length == 0)
                return null;
            var modeMap = {};
            var maxEl = array[0], maxCount = 1;
            for(var i = 0; i < array.length; i++)
            {
                var el = array[i];
                if(modeMap[el] == null)
                    modeMap[el] = 1;
                else
                    modeMap[el]++;  
                if(modeMap[el] > maxCount)
                {
                    maxEl = el;
                    maxCount = modeMap[el];
                }
            }
            return maxEl;
        }
        maxAppearedNos();

JS: Check for most repeating number in array

1 Answers1