1(defun dotp (v u) (if (or (endp v) (endp u)) 0 (+ (* (first v) (first u)) (dotp (rest v) (rest u)))))
1function dotProduct(v1:Vector.<Number>, v2:Vector.<Number>):Number{ if(v1.length != v2.length) return NaN; var sum:Number = 0; for(var i:uint = 0; i < v1.length; i++) sum += v1[i]*v2[i]; return sum;}trace(dotProduct(Vector.<Number>([1,3,-5]),Vector.<Number>([4,-2,-1])));