Answer by Bhojak Rahul for How to count string occurrence in string?

const getLetterMatchCount = (guessedWord, secretWord) => {  const secretLetters = secretWord.split('');  const guessedLetterSet = new Set(guessedWord);  return secretLetters.filter(letter => guessedLetterSet.has(letter)).length;};const str = "rahul";const str1 = "rajendra";getLetterMatchCount(str, str1)