diff --git a/stdlib/stdlib.lisp b/stdlib/stdlib.lsp
similarity index 70%
rename from stdlib/stdlib.lisp
rename to stdlib/stdlib.lsp
index f52c40e..472fbf9 100644
--- a/stdlib/stdlib.lisp
+++ b/stdlib/stdlib.lsp
@@ -1,25 +1,15 @@
-; quicksort
-(defun quick-sort (l)
-    (if (<= (len l) 1)
-        l
-        (do
-            (define pivot (first l))
-            (+
-                (quick-sort (filter (lambda (n) (> pivot n)) l))
-                (list pivot)
-                (quick-sort (tail (filter (lambda (n) (<= pivot n)) l)))
-            ))
-    ))
-
-; decrement a number
-(defun dec (n) (- n 1))
-
-; increment a number
-(defun inc (n) (+ n 1))
 
 ; not a bool
 (defun not (x) (if x 0 1))
 
+; logical and
+(defun and (a b) (if a (if b 1 0) 0))
+
+; logical or
+(defun or (a b) (if a 1 (if b 1 0)))
+
+
+
 ; negate a number
 (defun neg (n) (- 0 n))
 
@@ -29,6 +19,14 @@
 ; is a number negative?
 (defun is-neg? (n) (< n 0))
 
+; decrement a number
+(defun dec (n) (- n 1))
+
+; increment a number
+(defun inc (n) (+ n 1))
+
+
+
 ; return second element of list
 (defun second (l) (index l 1))
 
@@ -41,6 +39,39 @@
 ; return fifth element of list
 (defun fifth (l) (index l 4))
 
+; return 1 when list contains item otherwise 0
+(defun member (lst itm) 
+    (do
+        ; TODO check if is empty list
+        (define found_index -1)
+        (define i 0)
+        (define lst_len (len lst))
+
+        (while (and (< i lst_len) (= found_index -1))
+            (if (= itm (index lst i))
+                (define found_index i)
+                (define i (+ i 1))
+                ))
+
+        ; TODO when nil will be implemented itm / nil
+        (if (!= -1 found_index)
+            1
+            0)
+    ))
+
+
+; quicksort
+(defun quick-sort (l)
+    (if (<= (len l) 1)
+        l
+        (do
+            (define pivot (first l))
+            (+
+                (quick-sort (filter (lambda (n) (> pivot n)) l))
+                (list pivot)
+                (quick-sort (tail (filter (lambda (n) (<= pivot n)) l)))
+            ))
+    ))
 
 
 ; from list of lists creates csv string
@@ -64,6 +95,3 @@
 
         rows_str
     ))
-
-
-(defun setq (var val) (define var val))
\ No newline at end of file