updated from Atlas

attic/sequences/bisect_find.py

@@ -0,0 +1,29 @@
+
+"""
+    >>> bisect_find([], 1)
+    -1
+    >>> import array
+    >>> import random
+    >>> SIZE = 10
+    >>> my_array = array.array('l', range(0, SIZE, 2))
+    >>> random.seed(42)
+    >>> for i in range(SIZE):
+    ...     print(i, bisect_find(my_array, i))
+    0 0
+    1 -1
+    2 1
+    3 -1
+    4 2
+    5 -1
+    6 3
+    7 -1
+    8 4
+    9 -1
+"""
+
+from bisect import bisect
+
+def bisect_find(seq, item):
+    left_pos = bisect(seq, item) - 1
+    return left_pos if seq and seq[left_pos] == item else -1
+