Get random array elements from array with limit

get_random_array_elements_limit.js

function getRandomArrayElements(arr, count) {
    var sliceStart = getRandomInt(0, arr.length - count),
        randomSlice = arr.slice(sliceStart, sliceStart + count);
    return shuffleArray(randomSlice);
}

/**
 * Returns a random integer between min (inclusive) and max (inclusive)
 * Using Math.round() will give you a non-uniform distribution!
 */
function getRandomInt(min, max) {
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

function shuffleArray(array) {
    var counter = array.length;

    // While there are elements in the array
    while (counter > 0) {
        // Pick a random index
        var index = Math.floor(Math.random() * counter);

        // Decrease counter by 1
        counter--;

        // And swap the last element with it
        var temp = array[counter];
        array[counter] = array[index];
        array[index] = temp;
    }

    return array;
}