adding the array_complement method

boolean_algebra/array_complement.py

@@ -0,0 +1,23 @@
+def array_complement(initial_lst: list, diff_lst: list) -> list:
+    """
+    removes all values from list initial_lst which
+    are also present in list diff_lst [ while keeping
+    the initial order of the elements ]
+
+    https://en.wikipedia.org/wiki/Complement_(set_theory)
+
+    >>> array_complement([1, 6, 2, 8], [1, 4])
+    [6, 2, 8]
+    >>> array_complement([146], [146, 25])
+    []
+    >>> array_complement([35], [36])
+    [35]
+
+
+    """
+
+    return [c for c in initial_lst if c not in diff_lst]
+
+
+if __name__ == "__main__":
+    __import__("doctest").testmod()