Contents

import "dart:math" show pow;

class DifferenceOfSquares {
  int squareOfSums(int input) => pow(_sum(input), 2);

  int sumOfSquares(int input) => _range(input).map((i) => pow(i, 2)).reduce((r, i) => r + i);

  int difference(int input) => squareOfSums(input) - sumOfSquares(input);

  int _sum(int input) => input * (input + 1) ~/ 2;

  List<int> _range(int length) => new List<int>.generate(length, (i) => i + 1);
}

Version data entries

127 entries across 127 versions & 1 rubygems

Version	Path
trackler-2.2.1.113	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.111	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.110	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.109	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.108	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.107	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.106	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.105	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.104	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.103	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.102	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.101	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.100	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.99	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.98	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.97	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.96	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.95	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.94	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.93	tracks/dart/exercises/difference-of-squares/lib/example.dart