X-Git-Url: http://nitlanguage.org

diff --git a/lib/standard/string.nit b/lib/standard/string.nit
index 1c7e953..164e6f3 100644
--- a/lib/standard/string.nit
+++ b/lib/standard/string.nit
@@ -15,6 +15,7 @@
 package string
 
 intrude import collection # FIXME should be collection::array
+import hash
 
 ###############################################################################
 # String                                                                      #
@@ -246,6 +247,20 @@ special AbstractString
 	end
 
 	redef fun to_s do return self
+
+	redef fun hash
+	do
+		# djb2 hash algorythm
+		var h = 5381
+		var i = _length - 1
+		var it = _items
+		while i >= 0 do
+			h = (h * 32) + h + it[i].ascii
+			i -= 1
+		end
+		return h
+
+	end
 end
 
 # Strings are arrays of characters.
@@ -399,7 +414,7 @@ redef class Object
 		return "<{object_id.to_hex}"
 	end
 
-	protected fun args: IndexedCollection[String]
+	protected fun args: Sequence[String]
 	do
 		return sys.args
 	end
@@ -587,9 +602,9 @@ class StringCapable
 end
 
 redef class Sys
-	var _args_cache: nullable IndexedCollection[String]
+	var _args_cache: nullable Sequence[String]
 
-	redef fun args: IndexedCollection[String]
+	redef fun args: Sequence[String]
 	do
 		if _args_cache == null then init_args
 		return _args_cache.as(not null)