update from Atlas

attic/iterables/CACM/less_more.py

@@ -0,0 +1,22 @@
+"""
+Meijer, Erik - The Curse of the Excluded Middle
+DOI:10.1145/2605176
+CACM vol.57 no.06
+"""
+
+def less_than_30(n):
+    check = n < 30
+    print('%d < 30 : %s' % (n, check))
+    return check
+
+def more_than_20(n):
+    check = n > 20
+    print('%d > 20 : %s' % (n, check))
+    return check
+
+l = [1, 25, 40, 5, 23]
+q0 = (n for n in l if less_than_30(n))
+q1 = (n for n in q0 if more_than_20(n))
+
+for n in q1:
+    print('-> %d' % n)