reduce abstract method

double reduce(
  1. double identity,
  2. double op(
    1. double,
    2. double
    )
)

Reduces the stream using the identity and associative binary operator.

Example

final sum = DoubleStream.of([1.5, 2.5, 3.5])
    .reduce(0.0, (a, b) => a + b); // 7.5

Implementation

double reduce(double identity, double Function(double, double) op);