array_count_values for JavaScript instead

Question

I have the following PHP-script, now I need to do the same thing in JavaScript. Is there a function in JavaScript that works similar to the PHP function, I have been searchi

Answer 1

How about this:

function arrayCountValues (arr) {
    var v, freqs = {};

    // for each v in the array increment the frequency count in the table
    for (var i = arr.length; i--; ) { 
        v = arr[i];
        if (freqs[v]) freqs[v] += 1;
        else freqs[v] = 1;
    }

    // return the frequency table
    return freqs;
}