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-2.2.1.119	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.118	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.117	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.116	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.115	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.114	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.113	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.111	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.110	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.109	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.108	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.107	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.106	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.105	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.104	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.103	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.102	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.101	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.100	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.99	tracks/pony/exercises/difference-of-squares/example.pony