JS generates function code for non-repeating random arrays_javascript skills

//Get the random number in the array
//HF. Math.RandomNumbers is a prefix, you can define it yourself, mainly depends 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;
}