evaluate method

@override dynamic evaluate([ dynamic x ])

Evaluates the Polynomial for a given x value.

Implementation

@override
dynamic evaluate([dynamic x]) {
  // If x is a context Map, look up the variable's value
  final value = (x is Map<String, dynamic>)
      ? (x[variable.identifier.name] ?? Complex.zero())
      : (x ?? Complex.zero());

  dynamic result = Complex.zero();
  for (var i = 0; i < coefficients.length; i++) {
    // result += coefficients[i] * pow(x, coefficients.length - 1 - i);
    var term = Multiply(coefficients[i],
        Pow(Literal(value), Literal(coefficients.length - 1 - i)));

    Expression currentResult =
        (result is Expression) ? result : Literal(result);
    result = Add(currentResult, term).evaluate();
  }
  return result;
}