JQuery Javascript Sort Array by Highest Count

Question

I have:

myArray = [\"ABAB\", \"ABAB\", \"ABAB\", \"CDCD\", \"EFEF\", \"EFEF\"]

I need to count by occurrences and sort by highest count. This w

Answer 1

I recently created a library with such a function.

var items = {}, sortableItems = [], i, len, element,
    listOfStrings = ["ABAB", "ABAB", "ABAB", "CDCD", "EFEF", "EFEF"];

for (i = 0, len = listOfStrings.length; i < len; i += 1) {
    if (items.hasOwnProperty(listOfStrings[i])) {
        items[listOfStrings[i]] += 1;
    } else {
        items[listOfStrings[i]] = 1;
    }
}

for (element in items) {
    if (items.hasOwnProperty(element)) {
        sortableItems.push([element, items[element]]);
    }
}

sortableItems.sort(function (first, second) {
    return second[1] - first[1];
});

console.log(sortableItems);

Output

[ [ 'ABAB', 3 ], [ 'EFEF', 2 ], [ 'CDCD', 1 ] ]