description

# firstWhere method

E firstWhere(

1. bool test(
   1. E value
   ), {
2. E orElse()?,

})
override

The first element that satisfies the given predicate `test`.

Iterates through elements and returns the first to satisfy `test`.

Example:

    final numbers = <int>[1, 2, 3, 5, 6, 7];
    var result = numbers.firstWhere((element) => element < 5); // 1
    result = numbers.firstWhere((element) => element > 5); // 6
    result =
        numbers.firstWhere((element) => element > 10, orElse: () => -1); // -1

If no element satisfies `test`, the result of invoking the `orElse` function is returned. If `orElse` is omitted, it defaults to throwing a StateError. Stops iterating on the first matching element.

## Implementation

    E firstWhere(bool test(E value), {E Function()? orElse}) {
      for (E element in this) {
        if (test(element)) return element;
      }
      if (orElse != null) return orElse();
      throw IterableElementError.noElement();
    }