function getTokens(rawString) {
  // NB: `.filter(Boolean)` removes any falsy items from an array
  return rawString.toLowerCase().split(/[ ,!.";:-]+/).filter(Boolean).sort();
}
// The getTokens function is first asking for an input of a string(rawString).
// Then from the many different methods it alters the string in these ways:
// 1) lower case strings
// 2) It turns the string into an array that creates a new substring when /[ ,!.";:-]+/ is present.
// 3) It also only returns True statements.
// 4) Lastly it sorts the array alphabetically.

function mostFrequentWord(text) {
  let words = getTokens(text);
  // It sets the variable "words" with a value of a string from getTokens.
  let wordFrequencies = {};
  //  wordFrequencies" variable is set as an empty object in which a number will be stored.
  for (let i = 0; i <= words.length; i++) {
    if (words[i] in wordFrequencies) {
      wordFrequencies[words[i]]++;
    } else {
      wordFrequencies[words[i]] = 1;
    }
  // In this loop it states that if a word appears in the object, then the count is increased, and if it does not appear, then it's value is 1."
  }
  let currentMaxKey = Object.keys(wordFrequencies)[0];
  let currentMaxCount = wordFrequencies[currentMaxKey];
  // The variable "currentMaxKey" that sets the key at 0 and "currentMaxCount" is a variable that gives the value shows up in the object.

  for (let word in wordFrequencies) {
    if (wordFrequencies[word] > currentMaxCount) {
      currentMaxKey = word;
      currentMaxCount = wordFrequencies[word];
    }
  // This loop means that that if the word count is larger than value of the currentMaxCount, then the values change to reflect the "wordFrequencies" .
  }
  return currentMaxKey;
  // This returns the word with the highest number.
}