Contents

use "collections"
use "itertools"

primitive Squares
  fun square_of_sums(n: USize): USize =>
    let sum = (n * (n + 1)) / 2
    sum * sum

  fun sum_of_squares(n: USize): USize =>
    Iter[USize](Range(0, n + 1))
      .map[USize]({(x: USize): USize => x * x })
      .fold[USize](0, {(acc: USize, x: USize): USize => acc + x })

  fun difference(n: USize): USize =>
    square_of_sums(n) - sum_of_squares(n)

Version data entries

119 entries across 119 versions & 1 rubygems

Version	Path
trackler-2.2.1.98	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.97	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.96	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.95	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.94	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.93	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.92	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.91	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.90	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.89	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.88	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.87	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.86	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.85	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.84	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.83	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.82	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.81	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.80	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.79	tracks/pony/exercises/difference-of-squares/example.pony