From 13ddc6d96b713e70fe99c8e9b68a00fd73728960 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tobias=20L=C3=BCtke?= <tobi@jadedpixel.com>
Date: Thu, 15 Jan 2009 16:59:18 -0500
Subject: [PATCH] Added append/prepend filters

---
 lib/liquid/standardfilters.rb | 12 +++++++++++-
 test/standard_tag_test.rb     | 12 ++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/lib/liquid/standardfilters.rb b/lib/liquid/standardfilters.rb
index 254ac72a..19ace466 100644
--- a/lib/liquid/standardfilters.rb
+++ b/lib/liquid/standardfilters.rb
@@ -103,7 +103,17 @@ module Liquid
     # remove the first occurrences of a substring
     def remove_first(input, string)
       input.to_s.sub(string, '')      
-    end            
+    end             
+                              
+    # add one string to another
+    def append(input, string)
+      input.to_s + string.to_s
+    end
+                                
+    # prepend a string to another
+    def prepend(input, string)
+      string.to_s + input.to_s
+    end
                                              
     # Add <br /> tags in front of all newlines in input string
     def newline_to_br(input)        
diff --git a/test/standard_tag_test.rb b/test/standard_tag_test.rb
index 7b332536..0de995be 100644
--- a/test/standard_tag_test.rb
+++ b/test/standard_tag_test.rb
@@ -393,6 +393,18 @@ HERE
     assert_template_result('321','{%for item in array reversed %}{{item}}{%endfor%}',assigns)    
   end
   
+  def test_append
+    assigns = {'a' => 'bc', 'b' => 'd' }
+    assert_template_result('bcd',"{{ a | append: 'd'}}",assigns)        
+    assert_template_result('bcd',"{{ a | append: b}}",assigns)        
+  end
+  
+  def test_prepend
+    assigns = {'a' => 'bc', 'b' => 'a' }
+    assert_template_result('abc',"{{ a | prepend: 'a'}}",assigns)        
+    assert_template_result('abc',"{{ a | prepend: b}}",assigns)        
+  end
+  
   def test_ifchanged
     assigns = {'array' => [ 1, 1, 2, 2, 3, 3] }
     assert_template_result('123','{%for item in array%}{%ifchanged%}{{item}}{% endifchanged %}{%endfor%}',assigns)