Extracting the most duplicate value from an array in JavaScript (with jQuery)

Question

I have several array to deal with. I need to extract the most duplicate value from each array.

From [3, 7, 7, 7], I need to find the value 7

Answer 1

Another solution can be based on Array.reduce():

var arr = [1,1,2,5,4,2,10,10,1,1,1,3,10,10,3,4,3,10,3,5,6,2,3,1,1,10,10,2,4,3,6,10,6,6];

var result = arr.reduce(function(acc, e) {
    acc[e] = (acc[e] || 0) + 1;
    if (acc[e] > acc.mostFreq.freq) {
        acc.mostFreq.value = e;
        acc.mostFreq.freq = acc[e];
    }
    return acc;
}, {"mostFreq": {"value": 0, "freq": 0}}).mostFreq;

console.log('The most duplicated elements is: ' + JSON.stringify(result));