Iterating through objects | js-v1 checkpoint

most frequent word analyzer challenge

function getTokens(rawString) {
  // The 'getTokens' function is definded by the parameter 'rawString'
  return rawString.toLowerCase().split(/[ ,!.";:-]+/).filter(Boolean).sort();
}
  // 'rawString.toLowerCase()' forces all of the characters in the rawString to lowercase.
  // '.split(/[ ,!.";:-]+/)' splits the 'rawString' into a new array using the seperators (/[ ,!.";:-]+/) and where to  
  // spilt each word.
  // '.filter(Boolean)' removes all of the false items from the array.
  // '.sort()' sorts all of the items in the array alphabetically.

function mostFrequentWord(text) {
// Declares a function called mostFrequentWord with a parameter of 'text'.
  let words = getTokens(text);
  // The above declares the variable 'words' and assigns it the value of text that has been run through the getTokens   
  // function.
  let wordFrequencies = {};
  // This creates the empty object called 'wordFrequencies'.
  for (let i = 0; i <= words.length; i++) {
  // The for loop that iterates through each element in the array.
    if (words[i] in wordFrequencies) {
      wordFrequencies[words[i]]++;
    // This if statement states that if the current word in the array is already in the wordFrequencies object, then the      // loop increases its value by 1.
    } else {
      wordFrequencies[words[i]] = 1;
    }
    // This else statement states that if it is not in the wordFrequencies object, then it adds it and sets it a value of     // 1.
  }

  let currentMaxKey = Object.keys(wordFrequencies)[0];
  // The above declares a variable called currentMaxKey with a value that is equal to whatever the first key in the 
  // wordFrequencies object is.
  let currentMaxCount = wordFrequencies[currentMaxKey];
  // The above declares a variable called currentMaxCount with a value that is defined with the currentMaxKey variable.
  
  for (let word in wordFrequencies) {
    // This loop looks through the keys in the wordFrequencies object.
    if (wordFrequencies[word] > currentMaxCount) {
      // This if statement compares the keys in the object to their value to the currentMaxCount. 
      currentMaxKey = word;
      currentMaxCount = wordFrequencies[word];
      // If the value of the word is greater than currentMaxCount, currentMaxKey replace the word stored in currentMaxKey       // and sets the currentMaxCount to its value.
    }
  }
  return currentMaxKey;
  // The above will output the word that occurs the most in the string from the method.
}