select<R> method

ZenQuery<R> select<R>(
  1. R selector(
    1. T data
    )
)

Creates a derived query that selects a subset of data.

The derived query shares the lifecycle and state of this query, but only updates its data when the selected value changes.

Implementation

ZenQuery<R> select<R>(R Function(T data) selector) {
  return _SelectedZenQuery<T, R>(this, selector);
}