ExpressionInterface constructor Null safety

ExpressionInterface(
  1. {required String expression,
  2. required Map<String, double> variables,
  3. Map<String, double>? constants}
)

Create a new math expression for example:

final expression = Expression(
  expression: "a / b",
  variables: { "a": 4, "b": 2 }
);
print("${expression.value}"); // -> 4 / 2 = 2
// Call clear to free up memory
expression.clear();

Implementation

ExpressionInterface(
    {required String expression,
    required Map<String, double> variables,
    Map<String, double>? constants});