[Ёлочка]

Так может быть?

var arr:Array = [ 1.2, -1.5, 1.21, -1.24, 1.03, -1.654, 1.6345, -1.34, 1.01 ];
trace(arr.sort(sorting));
function sorting(a:Number, b:Number):Number
{
	if (a < b) {return -1;}
	else if (a > b) {return 1;}
	else {return 0;}
}

-1.654,-1.5,-1.34,-1.24,1.01,1.03,1.2,1.21,1.6345