Get the item that appears the most times in an array

Question

var store = [\'1\',\'2\',\'2\',\'3\',\'4\'];

I want to find out that 2 appear the most in the array. How do I go about doing that?

Answer 1

I solved it this way for finding the most common integer

function mostCommon(arr) {
    // finds the first most common integer, doesn't account for 2 equally common integers (a tie)

    freq = [];

    // set all frequency counts to 0
    for(i = 0; i < arr[arr.length-1]; i++) {
      freq[i] = 0;
    }

    // use index in freq to represent the number, and the value at the index represent the frequency count 
    for(i = 0; i < arr.length; i++) {
      freq[arr[i]]++; 
    }

    // find biggest number's index, that's the most frequent integer
    mostCommon = freq[0];
    for(i = 0; i < freq.length; i++) {
      if(freq[i] > mostCommon) {
        mostCommon = i;
      }
    }

    return mostCommon;
}