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-2.2.1.78	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.77	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.76	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.75	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.74	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.73	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.72	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.71	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.70	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.69	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.68	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.67	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.66	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.65	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.64	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.63	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.62	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.61	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.60	tracks/pony/exercises/difference-of-squares/example.pony