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-2.2.1.180	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.179	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.178	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.177	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.176	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.175	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.174	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.173	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.172	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.171	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.170	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.169	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.167	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.166	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.165	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.164	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.163	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.162	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.161	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.160	tracks/pony/exercises/difference-of-squares/example.pony