Generate random number from specific set of numbers as3

Question

I would like to create a random number between specific numbers, let say I have the numbers 1,2,4,5,7,8,9 and I want to generate a number between these specific numbers. Is

Answer 1

What about:

var arr:Array = [ 1,2,4,5,7,8,9 ];

var rand:Number = arr[ Math.floor( Math.random() * arr.length ) ];

trace( rand );

Or even more elegant:

var rand:Number = arr[ ( Math.random() * arr.length ) | 0 ];