diff --git a/include/tlibc/collections/Array.h b/include/tlibc/collections/Array.h
index 631db5a..6b433a0 100755
--- a/include/tlibc/collections/Array.h
+++ b/include/tlibc/collections/Array.h
@@ -38,11 +38,12 @@ static inline Array_ Array_copy(Array_ src){
 
 #define struct_castTo_Array(STRUCT_PTR) Array_construct_size((STRUCT_PTR), sizeof(*STRUCT_PTR))
 
+///@return a[0..n]
 static inline Array(u8) Array_sliceBefore(Array(u8) a, u32 n){
     return Array_construct_size(a.data, n);
 }
 
-
+///@return a[n...]
 static inline Array(u8) Array_sliceAfter(Array(u8) a, u32 n){
     return Array_construct_size((u8*)a.data + n, a.size - n);
 }
diff --git a/include/tlibc/string/str.h b/include/tlibc/string/str.h
index 866961d..43903ee 100755
--- a/include/tlibc/string/str.h
+++ b/include/tlibc/string/str.h
@@ -59,3 +59,14 @@ str hex_to_str(Array(u8) buf, bool uppercase);
 
 /// @brief removes blank characters from start and end of the line
 void str_trim(str* line, bool set_zero_at_end);
+
+
+///@return s[0..n]
+static inline str str_sliceBefore(str s, u32 n){
+    return str_construct(s.data, n, false);
+}
+
+///@return s[n...]
+static inline str str_sliceAfter(str s, u32 n){
+    return str_construct(s.data + n, s.size - n, s.isZeroTerminated);
+}