lookaround_iterator 1.0.1

  • README.md
  • Installing
  • Versions
  • 50

Dart lookaround iterator

The LookaroundIterator class exposes a fixed number of elements in the past and future of the current iteration element.

// `it` is an iterator over a list of the numbers 1..10, currently
// pointing at `4`.
final it = new LookaroundIterator(
    new List.generate(10, (n) => n + 1).iterator,
    lookbehind: 2,
    lookahead: 3)

// Prints _2, 3, 4, 5, 6, 7_.
// Notice the negative start index and the inclusive range `<=`.
for (int i = -it.lookbehind; i <= it.lookahead; i++) {



  • Cosmetic changes to appease pana: Add analysis_options.yaml and CHANGELOG.md.
  • Fix strong_mode and linter warnings.
  • Update repository name in pubspec.yaml.


  • Initial version.

1. Depend on it

Add this to your package's pubspec.yaml file:

  lookaround_iterator: "^1.0.1"

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter packages get

Alternatively, your editor might support pub get or packages get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:lookaround_iterator/lookaround_iterator.dart';
Version Uploaded Documentation Archive
1.0.1 Dec 6, 2017 Go to the documentation of lookaround_iterator 1.0.1 Download lookaround_iterator 1.0.1 archive
1.0.0 Aug 13, 2017 Go to the documentation of lookaround_iterator 1.0.0 Download lookaround_iterator 1.0.0 archive


This feature is new.
We welcome feedback.
More details: scoring.

We analyzed this package, and provided a score, details, and suggestions below.

  • completed on Feb 3, 2018
  • Dart: 2.0.0-dev.20.0
  • pana: 0.10.1


Describes how popular the package is relative to other packages. [more]
0 / 100
Code health derived from static analysis. [more]
100 / 100
Reflects how tidy and up-to-date the package is. [more]
100 / 100
Overall score:
Weighted score of the above. [more]


Detected platforms: Flutter, web, other

No platform restriction found in primary library package:lookaround_iterator/lookaround_iterator.dart.


  • Maintain an example.

    Create a short demo in the example/ directory to show how to use this package. Common file name patterns include: main.dart, example.dart or you could also use lookaround_iterator.dart.


Package Constraint Resolved Available
Dev dependencies
test ^0.12.0