Hi Allen,
Just a thought, but maybe have the quiz numbers set in an array that
the var n:Number is retrieved and have the min and max that the
random code calls match the amount of items in the array.
After selecting a question, remove it from the array, thus the array
length (max) reduces and the random code still works, but the
previous questions are no longer in the array to choose from.
var numArray:Array = new Array();
numArray = [40, 20, 35, 4, 5, 9];
var currentNum:Number = null;
function randRange(min:Number, max:Number):Number {
var randomNum:Number = Math.floor(Math.random(max, min));
return randomNum;
}
for (var i = 0; i < numArray.length; i++) {
var n:Number = randRange(0, numArray.length);
currentNum = numArray[n];
numArray = numArray.splice(n);
trace("incrament number: "+i);
trace("currentNum: "+currentNum);
trace("numArray: "+numArray);
}
This was off the top of the head, so you will need to test it.
HTH,
Karl
On May 5, 2010, at 7:45 PM, Alan Neilsen wrote:
I am working in ActionScript 2. I want to create a quiz in which 10
questions are randomly selected from a block of 40 questions. I
found the following code, but I can't work out how to stop it
doubling up the questions.
function randRange(min:Number, max:Number):Number {
var randomNum:Number = Math.floor(Math.random() * (max - min +
1)) + min;
return randomNum;
}
for (var i = 0; i < 10; i++) {
var n:Number = randRange(1, 40)
trace(n);
}
When I run this it outputs a list of numbers like 40 13 17 12
27 12 3 17 9 15 which means some questions (in this case 17
and 12) will appear twice in my quiz.
Bearing in mind that I am a bit of an ActionScript dummy, can
anybody suggest a way to modify the above script to prevent the
same number being generated more than once.
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