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-2.2.1.139	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.138	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.137	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.136	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.135	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.134	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.133	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.132	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.131	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.130	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.129	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.128	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.127	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.126	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.125	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.124	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.123	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.122	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.121	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.120	tracks/pony/exercises/difference-of-squares/example.pony