tuple_dart 1.4.2

A library providing a tuple data structure for Dart and a convenient way to use it

Tuple dart

A library providing a tuple data structure for Dart.

• No dependency
• Easy usage
• Support tuple1 - tuple8
• ideal for use with compute
• Used by the itertools package

Usage

import 'package:tuple_dart/tuple.dart';

or

import 'package:tuple_dart/tuple_dart.dart';

Example

import 'package:tuple_dart/tuple.dart';

void print2(Object? first, Object? second) {
  print('$first $second');
}

void main() {
  final tuple = Tuple2('first', 2); // type Tuple2<String, int>
  tuple.apply(print2); // output: "first 2";
  final tuple2 = tuple.withItem2('second'); // type Tuple2<String, String>
  tuple2.apply(print2); // output: "first second";
  // or equal
  print2.tuplized(tuple); // output: "first 2";
  // also R Function(Tuple<T1...TN>) has detuplized getter
  
  // tuplize transformation
  // R Function(T1...TN) -> R Function(Tuple<T1...TN>);
  // final print2tuplized = print2.tuplized; 
  
  // detuplized transformation
  // R Function(Tuple<T1...TN>) -> R Function(T1...TN);
  // final print2detupled = print2tuplized.detuplized; 

  // compatible with MapEntry
  final tuples = [
    Tuple2('1', 111),
    Tuple2('2', 222),
    Tuple2('3', 333),
    Tuple2('4', 444),
  ];

  print(Map<String, int>.fromEntries(tuples));
}

ideal for use with compute

import 'package:tuple_dart/tuple.dart';
import 'package:flutter/foundation.dart';

double hardCalculation(double a, double b, double c) {
  double result = 0.0;
  for (int i = 1; i < 1000; i++) {
    result = i * a + b * c / i;
  }
  return result;
}

void main() async {
  final result = await compute(hardCalculation.tuplized, Tuple3(0.1, 2.0, 10.0));
  print(result);
}

Links

Pub dev

Documentation

Issue tracker

Features and bugs

Please file feature requests and bugs at the issue tracker.