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Discussion on: Write a script to find "Perfect Numbers"

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Replies for: I wrote this script 3 years ago. def perfect_number(num): su = 0 for i in range(1, num): if num % i == 0: su += i ...

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chenge • • Edited

In JS, not so good cause I'm new to JS. If any good writing comment please.

const sum = (accumulator, currentValue) => accumulator + currentValue;

function range(size, startAt = 0) {
  return [...Array(size).keys()].map(i => i + startAt);
}

function sumDivisions(n){
  arr = range(n-1, startAt=1).filter(x => n % x == 0)
  return arr.reduce(sum, 0);
}

function is_perfect_number(n){
  return sumDivisions(n) == n
}

range(10000, 1).forEach(function(x){
  if(is_perfect_number(x)){
    console.log(x);
  }
})
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chenge •

Do you have a better version for Go?

package main

import (
  "fmt"
)

func sum_divisions(n int) int {
  sum := 0
  for i := 1; i < n; i++ {
    if n % i == 0 {
      sum += i
    }
  }
  return sum
}

func is_perfect(n int) bool {
  return n == sum_divisions(n)
}

func main() {
  for i := 1; i <= 10000; i++ {
    if is_perfect(i) {
      fmt.Println(i)
    }
  }
}