polyval function

double polyval(num x, List<num> coef)

Evaluates polynomial of degree N

                2          N

y = C + C x + C x +...+ C x 0 1 2 N

Coefficients are stored in reverse order:

coef0 = C , ..., coefN = C . N 0

polyval(5, [3,0,1]);  // 3 * 5**2 + 0 * 5**1 + 1
>>> 76

Implementation

double polyval(num x, List<num> coef) {
  final ite = coef.iterator;
  ite.moveNext();

  double ans = ite.current.toDouble();

  while (ite.moveNext()) {
    ans = ans * x + ite.current;
  }

  return ans;
}