https://github.com/kseo/tap

Ruby's Object#tap for Dart
https://github.com/kseo/tap

Last synced: 27 days ago
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Ruby's Object#tap for Dart

• Host: GitHub
• URL: https://github.com/kseo/tap
• Owner: kseo
• License: bsd-3-clause
• Created: 2015-11-22T14:24:07.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2015-12-09T04:42:55.000Z (almost 9 years ago)
• Last Synced: 2023-08-20T23:21:33.452Z (about 1 year ago)
• Language: Dart
• Homepage: https://pub.dartlang.org/packages/tap
• Size: 6.84 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
# tap

This package provides Ruby's [Object#tap method][tap] for Dart.

[![Build Status](https://travis-ci.org/kseo/tap.svg)](https://travis-ci.org/kseo/tap)

[![Coverage Status](https://coveralls.io/repos/kseo/tap/badge.svg?branch=master&service=github)](https://coveralls.io/github/kseo/tap?branch=master)

[tap]: http://ruby-doc.org/core-2.2.3/Object.html#method-i-tap

## Usage

The primary purpose of this method is to “tap into” a method chain,

in order to perform operations on intermediate results within the chain.

```dart

import 'package:quiver_collection/collection.dart';

import 'package:tap/tap.dart';

List gen(int n) => new List.generate(n, (i) => i);

class MyList extends DelegatingList with TapMixin> {

  final List _base = new List();

  @override

  List get delegate => _base;

  @override

  String toString() => _base.toString();

}

main() {

  final xs = new MyList()..addAll(gen(10));

  xs

    ..tap((xs) => print('original: $xs'))

    ..removeWhere((x) => x % 2 == 0)

    ..tap((xs) => print('removed: $xs'))

    ..shuffle()

    ..tap((xs) => print('shuffled: $xs'))

    ..sort()

    ..tap((xs) => print('sorted: $xs'));

  // original: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

  // removed: [1, 3, 5, 7, 9]

  // shuffled: [3, 1, 7, 9, 5] (can differ)

  // sorted: [1, 3, 5, 7, 9]

}

```

## Features and bugs

Please file feature requests and bugs at the [issue tracker][tracker].

[tracker]: https://github.com/kseo/tap/issues