updated contents from Atlas repo

iterables/CACM/citation.txt

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+Examples in this directory were adapted from:
+
+Erik Meijer. 2014. The curse of the excluded middle.
+Commun. ACM 57, 6 (June 2014), 50-55. DOI=10.1145/2605176
+http://doi.acm.org/10.1145/2605176

iterables/CACM/closed_file.py

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+"""
+Erik Meijer. 2014. The curse of the excluded middle.
+Commun. ACM 57, 6 (June 2014), 50-55. DOI=10.1145/2605176
+http://doi.acm.org/10.1145/2605176
+"""
+
+with open('citation.txt', encoding='ascii') as fp:
+    get_contents = lambda: fp.read()
+
+print(get_contents())

iterables/CACM/haha.py

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+"""
+Erik Meijer. 2014. The curse of the excluded middle.
+Commun. ACM 57, 6 (June 2014), 50-55. DOI=10.1145/2605176
+http://doi.acm.org/10.1145/2605176
+"""
+
+def ha():
+    ha = 'Ha'
+    print(ha)
+    return ha
+
+# prints 'Ha' twice before showing result
+print('result ->', ha() + ha())
+
+# prints 'Ha' only once before showing reult
+ha_res = ha()  # common subexpression elimination
+print('result ->', ha_res + ha_res)

iterables/CACM/less_more.py

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+"""
+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)

iterables/CACM/zero_div.py

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+"""
+Erik Meijer. 2014. The curse of the excluded middle.
+Commun. ACM 57, 6 (June 2014), 50-55. DOI=10.1145/2605176
+http://doi.acm.org/10.1145/2605176
+"""
+
+l = range(10, -1, -1)
+try:
+    res = (1/x for x in l)
+except ZeroDivisionError:
+    res = []
+
+for z in res:
+    print(z)