Funtional Programming

fp.js

const {
   log
} = console;

const pipe = (...funcs) => v => {
   return funcs.reduce((res, func) => {
      return func(res);
   }, v);
}

const factors = (num) => {
   let isFactor = (pod) => num % pod == 0;

   let arr = Array.from({
         length: parseInt(Math.sqrt(num))
      }, (_, i) => i + 1)
      .filter(pod => isFactor(pod))
      .reduce((acc, pod) => acc.add(pod).add(num / pod), new Set);
   return arr;
}

const sum = (factors) => {
   let sumResult = Array.from(factors).reduce((acc, curr) => acc + curr, 0);
   return sumResult;
}

let check = (num) => pipe(factors, sum)(num) - num;

//MISSION 1
log('mission1-----------------------')
const isPerfect = (num) => check(num) == num;
const isAbundant = (num) => check > num;
const isDeficient = (num) => check < num;
const isPrime = (num) => check == 1;

log("case1:", isPerfect(10));
log("case2:", isPrime(6));
log("case3:", isDeficient(7));


//MISSION2_TEST
log('mission2-----------------------')
const factorCheck = (num) => {
   if (check(num) == num) 'Perfect';
   if (check(num) > num) return 'Abundant';
   if (check(num) > 1 && check(num) < num) return 'Deficient';
   if (check(num) == 1) return 'Deficient, Prime';

}

const hundred = (maxNum) => {
   return Array.from({
      length: maxNum - 1
   }, (_, i) => 2 + i);
}

const result = (resultArray) => {
   return resultArray.reduce((acc, curr) => {
      acc += `${curr}:${factorCheck(curr)}\n`;
      return acc;
   }, '');
}

log(pipe(hundred, result)(100));