dragonza

function reverseInt(n) {
  const reversed = n.toString().split('').reverse().join(''); // turn a number into a string, then turn it into an array to reverse. 
  return Math.sign(n) * parseInt(reversed); // Math.sign will return -1 as for negative number, 1 as for position number, 0 as for zero.
}

dragonza

function maxChar(str) {
  const charMap = {};
  let max = 0;
  let maxChar = '';

  // create character map
  for (let char of str) {
    if (charMap[char]) {
      // increment the character's value if the character existed in the map
      charMap[char]++;

dragonza

const obj = {};
for (let char of str) {
  obj[char] = obj[char] + 1 || 1;
}

dragonza

const obj = {};
str.split('').forEach(char => obj[char] + 1 || 1); // remember to turn the given string into array first as forEach is Array prototype

dragonza

Object.keys(obj).forEach(char => {
  if (obj[char] > max) {
    maxChar = char;
    max = obj[char];
  }
});

dragonza

return Object.keys(obj).reduce((prev, next) => obj[a] >= obj[b] ? a : b);

dragonza

function maxChar(str) {
  const obj = {};
  str.split('').forEach(char => obj[char] + 1 || 1);
  return Object.keys(obj).reduce((prev, next) => obj[a] >= obj[b] ? a : b);
}

dragonza

function chunk(array, size) {
    const chunked_arr = [];
    for (let i = 0; i < array.length; i++) {
      const last = chunked_arr[chunked_arr.length - 1];
      if (!last || last.length === size) {
        chunked_arr.push([array[i]]);
      } else {
        last.push(array[i]);
      }
    }

dragonza

function chunk(array, size) {
  const chunked_arr = [];
  let copied = [...array]; // ES6 destructuring
  const numOfChild = Math.ceil(copied.length / size); // Round up to the nearest integer
  for (let i = 0; i < numOfChild; i++) {
    chunked_arr.push(copied.splice(0, size));
  }
  return chunked_arr;
}

dragonza

function chunk(array, size) {
  const chunked_arr = [];
  let index = 0;
  while (index < array.length) {
    chunked_arr.push(array.slice(index, size + index));
    index += size;
  }
  return chunked_arr;
}