Finding out how many times an array element appears

Question

I am new to JavaScript, I have been learning and practicing for about 3 months and hope I can get some help on this topic. I\'m making a poker game and what I\'m trying to d

Answer 1

Well..

var a = [5, 5, 5, 2, 2, 2, 2, 2, 9, 4].reduce(function (acc, curr) {
  if (typeof acc[curr] == 'undefined') {
    acc[curr] = 1;
  } else {
    acc[curr] += 1;
  }

  return acc;
}, {});

// a == {2: 5, 4: 1, 5: 3, 9: 1}

from here: Counting the occurrences of JavaScript array elements

Or you can find other solutions there, too..