add hash interpolation to gibberish

Author: defunkt

README

@@ -44,6 +44,11 @@ Notice we don't use hashes (#) like normal Ruby interpolation.  Also, the names
 in the brackets don't really mean much.  Interpolation is done in order -- the first argument replaces
 the first variable in brackets, the second the second, etc.
 
+Interpolation can also be done via hash:
+
+  >> "{name} is from {place}"[:hey_place, { :place => 'Gotham City', :name => 'Batman' }]
+  => "Batman is from Gotham City"
+
 This of course works with your translations:
 
   $ cat lang/es.yml

lib/gibberish/localize.rb

@@ -59,7 +59,21 @@ def load_languages!
 
   private
     def interpolate_string(string, *args)
-      string.gsub(/\{\w+\}/) { args.shift }
+      if args.last.is_a? Hash
+        interpolate_with_hash(string, args.last)
+      else
+        interpolate_with_strings(string, args)
+      end
+    end
+
+    def interpolate_with_hash(string, hash)
+      hash.inject(string) do |target, (search, replace)|
+        target.sub("{#{search}}", replace)
+      end 
+    end
+
+    def interpolate_with_strings(string, strings)
+      string.gsub(/\{\w+\}/) { strings.shift }
     end
 
     def language_files

test/gibberish_test.rb

@@ -134,6 +134,14 @@
     '{computer} omg?'[:puter, 'mac'].should.equal "mac omg?"
   end
 
+  specify "should interpolate based on key if passed a hash" do
+    'Hi, {user} of {place}'[:hi_there, { :place => 'france', :user => 'chris' }].should.equal "Hi, chris of france"
+
+    bands  = { 'other_bad_band' => 'Deputy', :good_band => 'Word Picture', 'bad_band' => 'Dagger' }
+    answer = 'Well, Dagger sucks and so does Deputy, but Word Picture is pretty rad.'
+    'Well, {bad_band} sucks and so does {other_bad_band}, but {good_band} is pretty rad.'[:snobbish, bands].should.equal answer
+  end
+
   specify "should not affect existing string methods" do
     string = "chris"
     answer = 'ch'