core+extensions.dart

import 'package:flutter/widgets.dart';

// MARK: - Iterable Extensions

extension FlutterishIterable<T> on Iterable<T> {

  List<Widget> toWidgets({
    required Widget Function(T element) itemBuilder,
    Widget Function()? separatorBuilder
  }) {
    if (separatorBuilder == null) {
      return this.map((e) => itemBuilder(e)).toList();
    }

    return this.cast<T?>()
      .expand((e) => e == this.last ? [e] : [e, null])
      .map((e) => e != null ? itemBuilder(e) : separatorBuilder())
      .cast<Widget>()
      .toList();
  }

}