JS generates function code that does not repeat random number groups

//Gets a random number in the array
//Hf.math.randomnumbers is a prefix, which can be defined by itself, mainly depending on the logic code
HF.Math.RandomNumbers = function (startNum, endNum, count, repeat) {
    var ret = [];
    if (repeat) {
        for (var i = 0; i < count; i++) {
            ret[i] = HF.Math.Random(startNum, endNum);
        }
        return ret;
    }
    var tmp = [];
    var i = 0;
    for (var s = startNum; s <= endNum; s++) {
        tmp[i++] = s;
    }
    var l = tmp.length;
    for (i = 0; i < count; i++) {
        ret[i] = HF.Array.Remove(tmp, HF.Math.Random(0, --l));
    }
    return ret;
}