Massive renaming!

11-things/README.md

@@ -0,0 +1,20 @@
+Style #10
+==============================
+
+Constraints:
+
+- The larger problem is decomposed into 'things' that make sense for
+  the problem domain 
+
+- Each 'thing' is a capsule of data that exposes procedures to the
+  rest of the world
+
+- Data is never accessed directly, only through these procedures
+
+- Capsules can reappropriate procedures defined in other capsules
+
+Possible names:
+
+- Things
+- Object-oriented style
+- The Kingdom of Nouns (http://steve-yegge.blogspot.com/2006/03/execution-in-kingdom-of-nouns.html)

11-things/tf-11.py

@@ -0,0 +1,81 @@
+#!/usr/bin/env python
+import sys, re, operator, string
+from abc import ABCMeta
+
+#
+# The classes
+#
+class TFExercise():
+    __metaclass__ = ABCMeta
+
+    def info(self):
+        return self.__class__.__name__
+
+class DataStorageManager(TFExercise):
+    """ Models the contents of the file """
+    
+    def __init__(self, path_to_file):
+        with open(path_to_file) as f:
+            self._data = f.read()
+        pattern = re.compile('[\W_]+')
+        self._data = pattern.sub(' ', self._data).lower()
+
+    def words(self):
+        """ Returns the list words in storage """
+        return self._data.split()
+
+    def info(self):
+        return super(DataStorageManager, self).info() + ": My major data structure is a " + self._data.__class__.__name__
+
+class StopWordManager(TFExercise):
+    """ Models the stop word filter """
+    
+    def __init__(self):
+        with open('../stop_words.txt') as f:
+            self._stop_words = f.read().split(',')
+        # add single-letter words
+        self._stop_words.extend(list(string.ascii_lowercase))
+
+    def is_stop_word(self, word):
+        return word in self._stop_words
+
+    def info(self):
+        return super(StopWordManager, self).info() + ": My major data structure is a " + self._stop_words.__class__.__name__
+
+class WordFrequencyManager(TFExercise):
+    """ Keeps the word frequency data """
+    
+    def __init__(self):
+        self._word_freqs = {}
+
+    def increment_count(self, word):
+        if word in self._word_freqs:
+            self._word_freqs[word] += 1
+        else:
+            self._word_freqs[word] = 1
+
+    def sorted(self):
+        return sorted(self._word_freqs.items(), key=operator.itemgetter(1), reverse=True)
+
+    def info(self):
+        return super(WordFrequencyManager, self).info() + ": My major data structure is a " + self._word_freqs.__class__.__name__
+
+class WordFrequencyController(TFExercise):
+    def __init__(self, path_to_file):
+        self._storage_manager = DataStorageManager(path_to_file)
+        self._stop_word_manager = StopWordManager()
+        self._word_freq_manager = WordFrequencyManager()
+
+    def run(self):
+        for w in self._storage_manager.words():
+            if not self._stop_word_manager.is_stop_word(w):
+                self._word_freq_manager.increment_count(w)
+
+        word_freqs = self._word_freq_manager.sorted()
+        for (w, c) in word_freqs[0:25]:
+            print(w, ' - ', c)
+
+#
+# The main function
+#
+WordFrequencyController(sys.argv[1]).run()

11-things/tf_10.java

@@ -0,0 +1,180 @@
+import java.io.*;
+import java.util.*;
+
+public class tf_10 {
+    /*
+     * The main function
+     */
+    public static void main(String[] args) throws IOException {
+        new WordFrequencyController(args[0]).run();
+    }
+}
+
+/*
+ * The classes
+ */
+
+abstract class TFExercise {
+    public String getInfo() {
+        return this.getClass().getName();
+    }
+}
+
+class WordFrequencyController extends TFExercise {
+    private DataStorageManager storageManager;
+    private StopWordManager stopWordManager;
+    private WordFrequencyManager wordFreqManager;
+    
+    public WordFrequencyController(String pathToFile) throws IOException {
+        this.storageManager = new DataStorageManager(pathToFile);
+        this.stopWordManager = new StopWordManager();
+        this.wordFreqManager = new WordFrequencyManager();
+    }
+    
+    public void run() {
+        for (String word : this.storageManager.getWords()) {
+            if (!this.stopWordManager.isStopWord(word)) {
+                this.wordFreqManager.incrementCount(word);
+            }
+        }
+        
+        int numWordsPrinted = 0;
+        for (WordFrequencyPair pair : this.wordFreqManager.sorted()) {
+            System.out.println(pair.getWord() + " - " + pair.getFrequency());
+            
+            numWordsPrinted++;
+            if (numWordsPrinted >= 25) {
+                break;
+            }
+        }
+    }
+}
+
+/** Models the contents of the file. */
+class DataStorageManager extends TFExercise {
+    private List<String> words;
+    
+    public DataStorageManager(String pathToFile) throws IOException {
+        this.words = new ArrayList<String>();
+        
+        Scanner f = new Scanner(new File(pathToFile), "UTF-8");
+        try {
+            f.useDelimiter("[\\W_]+");
+            while (f.hasNext()) {
+                this.words.add(f.next().toLowerCase());
+            }
+        } finally {
+            f.close();
+        }
+    }
+    
+    public List<String> getWords() {
+        return this.words;
+    }
+    
+    public String getInfo() {
+        return super.getInfo() + ": My major data structure is a " + this.words.getClass().getName();
+    }
+}
+
+/** Models the stop word filter. */
+class StopWordManager extends TFExercise {
+    private Set<String> stopWords;
+    
+    public StopWordManager() throws IOException {
+        this.stopWords = new HashSet<String>();
+        
+        Scanner f = new Scanner(new File("../stop_words.txt"), "UTF-8");
+        try {
+            f.useDelimiter(",");
+            while (f.hasNext()) {
+                this.stopWords.add(f.next());
+            }
+        } finally {
+            f.close();
+        }
+        
+        // Add single-letter words
+        for (char c = 'a'; c <= 'z'; c++) {
+            this.stopWords.add("" + c);
+        }
+    }
+    
+    public boolean isStopWord(String word) {
+        return this.stopWords.contains(word);
+    }
+    
+    public String getInfo() {
+        return super.getInfo() + ": My major data structure is a " + this.stopWords.getClass().getName();
+    }
+}
+
+/** Keeps the word frequency data. */
+class WordFrequencyManager extends TFExercise {
+    private Map<String, MutableInteger> wordFreqs;
+    
+    public WordFrequencyManager() {
+        this.wordFreqs = new HashMap<String, MutableInteger>();
+    }
+    
+    public void incrementCount(String word) {
+        MutableInteger count = this.wordFreqs.get(word);
+        if (count == null) {
+            this.wordFreqs.put(word, new MutableInteger(1));
+        } else {
+            count.setValue(count.getValue() + 1);
+        }
+    }
+    
+    public List<WordFrequencyPair> sorted() {
+        List<WordFrequencyPair> pairs = new ArrayList<WordFrequencyPair>();
+        for (Map.Entry<String, MutableInteger> entry : wordFreqs.entrySet()) {
+            pairs.add(new WordFrequencyPair(entry.getKey(), entry.getValue().getValue()));
+        }
+        Collections.sort(pairs);
+        Collections.reverse(pairs);
+        return pairs;
+    }
+    
+    public String getInfo() {
+        return super.getInfo() + ": My major data structure is a " + this.wordFreqs.getClass().getName();
+    }
+}
+
+class MutableInteger {
+    private int value;
+    
+    public MutableInteger(int value) {
+        this.value = value;
+    }
+    
+    public int getValue() {
+        return value;
+    }
+    
+    public void setValue(int value) {
+        this.value = value;
+    }
+}
+
+class WordFrequencyPair implements Comparable<WordFrequencyPair> {
+    private String word;
+    private int frequency;
+    
+    public WordFrequencyPair(String word, int frequency) {
+        this.word = word;
+        this.frequency = frequency;
+    }
+    
+    public String getWord() {
+        return word;
+    }
+    
+    public int getFrequency() {
+        return frequency;
+    }
+    
+    public int compareTo(WordFrequencyPair other) {
+        return this.frequency - other.frequency;
+    }
+}