paste it

This is probably the hardest quiz yet. After yesterdays very easy quiz I figured I’d do something really trickey… binary is always a good way to make a quiz hard… so most of the questions are about binary operators and ByteArray… there is also one question about Bezier math.

Number of Questions : 7
Difficulty : Hard
Topic : Binary and Bezier

Which random sequence would you associate the below snippet with?

for (var i:int = 0; i<4; i++){
  trace(int(Math.random()*2) - 1 | 1);
}

1, 0, 1, 0
2, 1, 0, 1
0, 0, 0, 0
1, -1, -1, 1
-2, 1, -2, 1

Which of the below sequences would you associate with the following snippet?

for (var i:int = 0; i<10; i++){
  trace(i & 2);
}

You may want to work this out on paper

0,0,0,2,2,0,0,0,2,2
0,0,0,0,4,4,4,4,0,0
0,1,0,1,0,1,0,1,0,1
0,0,2,2,0,0,2,2,0,0
0,2,0,2,0,2,0,2,0,2

A quadratic Bézier curve is the path traced by the function B(t), given points P₀, P₁ and P₂.

The above is from wikipedia.

Which of the below lines of actionscript accurately represents the B(t) function? Hint: Try working it out yourself and then choosing the answer that is closest to your own. You can use this template over at wonderfl to help you work it out:

Math.pow(1 - t, 2) + p0 + 2 * (1 - t) * t * p1 + t * 2 * p2
(1 - t) * 2 * p0 + (1 - t) * p1 + t * t * p2
(1 - t) * (1 - t) * p0 + 2 * (1 - t) * t * p1 + t * t * p2
(1 - t) * (1 - t) * p * 0 + 2 * (1 - t) * t * p * 1 + t * t * p * 2;

What is the length of the following ByteArray?

var bytes:ByteArray = new ByteArray();
bytes.writeInt(0xFFFFFF);

2
4
8
16

What is the length of the following ByteArray?

var bytes:ByteArray = new ByteArray();
bytes.writeInt(0xFFFFFF);
bytes.writeUnsignedInt(0xFFFFFF);

2
4
5
6
8
16

How many bytes does it take to represent a short in a ByteArray?

1
2
4
5

What will the following snippet trace to the output window?

var bytes:ByteArray = new ByteArray();
bytes[0] = 0;
bytes[1] = 0;
bytes[2] = 1;
bytes[3] = 1;

bytes.position = 0

trace(bytes.readInt());

11
16842752
3
257

Today’s quiz is not multiple choice. Instead, your task is to draw a spiral using a recursive function.

Optionally you can alter your function to draw other types of spiral forms:

(You can view various solutions in the comments - as well as my solution at wonderfl)