Just another update

Task/Anagrams/JavaScript/anagrams-2.js

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+var fs = require('fs');
+var dictionary = fs.readFileSync('unixdict.txt', 'UTF-8').split('\n');
+
+//group anagrams
+var sortedDict = dictionary.reduce(function (acc, word) {
+  var sortedLetters = word.split('').sort().join('');
+  if (acc[sortedLetters] === undefined) { acc[sortedLetters] = []; }
+  acc[sortedLetters].push(word);
+  return acc;
+}, {});
+
+//sort list by frequency
+var keysSortedByFrequency = Object.keys(sortedDict).sort(function (keyA, keyB) {
+  if (sortedDict[keyA].length < sortedDict[keyB].length) { return 1; }
+  if (sortedDict[keyA].length > sortedDict[keyB].length) { return -1; }
+  return 0;
+});
+
+//print first 10 anagrams by frequency
+keysSortedByFrequency.slice(0, 10).forEach(function (key) {
+  console.log(sortedDict[key].join(' '));
+});