Max Chars

How can you find the character count for sentences.

const sentence = "How are you doing today?";

const charCount = sentence
  .toLowerCase()
  .replace(/[^A-Za-z]/g, "")
  .split("")
  .reduce(
    (final, letter) => ({ ...final, [letter]: final[letter] + 1 || 1 }),
    {}
  );

Now determine which character displays the most

let maxLetter = null;
let maxCount = 0;
for (const letter in charCount) {
  const count = charCount[letter];
  if (count > maxCount) {
    maxLetter = letter;
    maxCount = count;
  }
}
const result = {maxLetter, maxCount};

And of course using reduce with the object’s keys

const max = Object.keys(charCount).reduce((mLetter, letter) => {
  if (mLetter.count >= charCount[letter]) {
    return mLetter;
  }
  return { count: charCount[letter], letter };
}, {});