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-2.2.1.92	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.91	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.90	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.89	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.88	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.87	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.86	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.85	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.84	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.83	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.82	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.81	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.80	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.79	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.78	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.77	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.76	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.75	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.74	tracks/dart/exercises/difference-of-squares/lib/example.dart
trackler-2.2.1.73	tracks/dart/exercises/difference-of-squares/lib/example.dart