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

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

Version data entries

158 entries across 158 versions & 1 rubygems

Version	Path
trackler-2.2.1.6	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.5	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.4	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.3	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.2	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.1	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.1.0	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.0.6	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.0.5	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.0.4	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.0.3	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.0.2	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.0.1	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.2.0.0	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.1.0.55	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.1.0.54	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.1.0.53	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.1.0.52	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.1.0.51	tracks/pony/exercises/difference-of-squares/example.pony
trackler-2.1.0.50	tracks/pony/exercises/difference-of-squares/example.pony