KF coding challenge

challenge.js

// 1. getAverage;
let getAverage = array => array.reduce((a, b) => a + b, 0) / array.length

// 2. DigitsExplode
let explode = s => s.replace(/[0-9]/g, d => d.repeat(d));

// 3. Parse string to key value pairs
function wordsToObject(input) {
    let arr = input.split(" ");
    const L = arr.length;
    let num = 0;
    let result = [];
    let obj = {};
    
    for (let i=0;i<L;i++) {
      if (i % 2 === 0) {
         obj.name = arr[i];
      } else {
         obj.id = arr[i];
      }
      
      if (obj.name && obj.id) {
        result[num] = `{name : '${obj.name}', id : '${obj.id}'}`;
        obj = {}
        num += 1;
      }
    } 
    let stringed = result.join(', ')
    return `[${stringed}]`; 
}

// 4. Sum of Multiples

// 5. Divisors

// 6. Angram Detection
const isAnagram=(a,b)=>a.length===b.length?((a,b)=>(a+b).toLowerCase().split('').filter((x)=>(a+b).toLowerCase().split('').filter((c)=>c===x).length===1).length===0)(a,b):false;

// 10. to Snake Case
const toSnake = (word) => {
  let result = '';
  for (let w of word) {
      if (w === w.toUpperCase()) {
        result += `_${w}`;
      } else {
         result += w;
      }
  }
  return result.toLowerCase();
}

challenge.re

(* 1. getAverage *)