Most Frequent Word Analyzer Challenge - Oscar Luna

gistfile1.txt

function getTokens(rawString) {
  // NB: `.filter(Boolean)` removes any falsy items from an array
  return rawString.toLowerCase().split(/[ ,!.";:-]+/).filter(Boolean).sort();
}

function mostFrequentWord(text) { // this is our function that takes the argument text.
  let words = getTokens(text);  // this tells the computer that every true item in the text is a word
  let wordFrequencies = {}      //wordFrequencies is an array that iterates through the whole text.
  for (let i = 0; i <= words.length; i++) {
    if (words[i] in wordFrequencies) {
      wordFrequencies[words[i]]++;
      //if a word i occurs, then wordFrequencies increments by 1 every time words[i] is true throughout this iteration; else it stays equal to 1.
    } else {
      wordFrequencies[words[i]] = 1;
    }
  }
  let currentMaxKey = Object.keys(wordFrequencies)[0]; 
  let currentMaxCount = wordFrequencies[currentMaxKey];
//This takes every key value of the object (word), and creates a counter for the highest count for a word.
  for (let word in wordFrequencies) {
    if (wordFrequencies[word] > currentMaxCount) {  
      currentMaxKey = word;
      currentMaxCount = wordFrequencies[word];
    }
  }
  return currentMaxKey;
}
//If the frequency of a word becomes greater than the currentMaxCount, then currentMaxKey's value is updated to the word's frequency, and the counter for highest frequency goes to the new most frequent word-- currentMaxKey.