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

diff --git a/lib/standard/collection/collection.nit b/lib/standard/collection/collection.nit
index 781cd54..0701cc7 100644
--- a/lib/standard/collection/collection.nit
+++ b/lib/standard/collection/collection.nit
@@ -11,11 +11,22 @@
 # another product.
 
 # This module define several collection classes.
-package collection
+module collection
 
-import abstract_collection
 import range
 import list
-intrude import array # FIXME because of string.nit
+import array
 import sorter
 import hash_collection
+import union_find
+
+redef class Sequence[E]
+
+	# Copy the content of `self` between `start` and `len` to a new Array.
+	fun subarray(start, len: Int): Array[E]
+	do
+		var a = new Array[E].with_capacity(len)
+		for i in [start .. start+len[ do a.add(self[i])
+		return a
+	end
+end