Analyze a most frequent word program Thinkful Unit 2 Lesson 6

mostFrequentWord.js

function getTokens(rawString) {
  // NB: `.filter(Boolean)` removes any falsy items from an array
  // .split : split words from to to an array,input of spliting is Regex.This Regex means ignore white space character and any other special characters like commas,semi-colon,exclamation marks,etc...
  // .sort : sorting words in an alphabetical order.
  return rawString.toLowerCase().split(/[ ,!.";:-]+/).filter(Boolean).sort();
}
  
function mostFrequentWord(text) {
  var words = getTokens(text);
  console.log(words);
  var wordFrequencies = {};

  for (var i = 0; i <= words.length; i++) {
    // Check if the current word appears in the wordFrequency object then count that word
    if (words[i] in wordFrequencies) {
      wordFrequencies[words[i]]++;
    }
    // If not it will be added to the object wordFrequencies
    else {
      wordFrequencies[words[i]]=1;
      console.log(words[i]+":"+wordFrequencies[words[i]]);
    }
  }
  // Find max algorithm
  var currentMaxKey = Object.keys(wordFrequencies)[0];
  var currentMaxCount = wordFrequencies[currentMaxKey];
  
  for (var word in wordFrequencies) {
    if (wordFrequencies[word] > currentMaxCount) {
      currentMaxKey = word;
      currentMaxCount = wordFrequencies[word];
    }
  }
  return currentMaxKey;
}