Doc sample class

lib/linguist/sample.rb

@@ -2,17 +2,25 @@ require 'linguist/classifier'
 require 'linguist/language'
 
 module Linguist
+  # Model for accessing classifier training data.
   class Sample
     # Samples live in test/ for now, we'll eventually move them out
     PATH = File.expand_path("../../../test/fixtures", __FILE__)
 
+    # Public: Iterate over each Sample.
+    #
+    # &block - Yields Sample to block
+    #
+    # Returns nothing.
     def self.each(&block)
       Dir.entries(PATH).each do |category|
         next if category == '.' || category == '..'
 
         # Skip text and binary for now
+        # Possibly reconsider this later
         next if category == 'text' || category == 'binary'
 
+        # Map directory name to a Language alias
         language = Linguist::Language.find_by_alias(category)
         raise "No language for #{category.inspect}" unless language
 
@@ -26,21 +34,41 @@ module Linguist
       nil
     end
 
+    # Public: Build Classifier from all samples.
+    #
+    # Returns trained Classifier.
     def self.classifier
       classifier = Classifier.new
       each { |sample| classifier.train(sample.language, sample.data) }
       classifier.gc
     end
 
+    # Internal: Initialize Sample.
+    #
+    # Samples should be initialized by Sample.each.
+    #
+    # path     - String full path to file.
+    # language - Language of sample.
     def initialize(path, language)
       @path     = path
       @language = language
     end
 
+    # Public: Get full path to file.
+    #
+    # Returns String.
+    attr_reader :path
+
+    # Public: Get sample language.
+    #
+    # Returns Language.
+    attr_reader :language
+
+    # Public: Read file contents.
+    #
+    # Returns String.
     def data
       File.read(path)
     end
-
-    attr_reader :path, :language
   end
 end