how to find which string is repeated more in an array in javascript code example

Example 1: find duplicates and their count in an array javascript

var counts = {};
your_array.forEach(function(x) { counts[x] = (counts[x] || 0)+1; });

Example 2: javascript create array with repeated values

Array(5).fill(2)
//=> [2, 2, 2, 2, 2]