--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sets-to-strings-via-bitarrays/example.py	Tue Jan 15 22:33:09 2013 +0900
@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+
+import string
+from bitarray import bitarray
+
+
+PARTLEN = 5 # 5 bits per character
+CHARS = (string.ascii_lowercase + string.digits)[:2 ** PARTLEN]
+# 'abcdefghijklmnopqrstuvwxyz012345'
+
+
+PARTS = {}
+for i, char in enumerate(CHARS):
+    PARTS[char] = bitarray(bin(i).lstrip('-0b').rjust(PARTLEN, '0'), endian='big')
+# {
+#   'a': bitarray('00000'),
+#   ...
+#   '5': bitarray('11111')
+# }
+
+
+def encode_set(ids):
+    times, more = divmod(max(ids) + 1, PARTLEN)
+    length = PARTLEN * (times + bool(more))
+    ba = bitarray(length, endian='big')
+    ba.setall(0)
+    
+    for id in ids:
+        ba[id] = 1
+    
+    return ''.join(ba.decode(PARTS))
+
+
+def decode_set(string):
+    result = bitarray(endian='big')
+    result.encode(PARTS, string)
+    return set(result.search(bitarray('1')))
+
+
+print(encode_set({1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16})) # Buttons in an elevator in Shanghai
+# 'o52y'
+
+print(encode_set({1, 4, 11, 16, 24, 29, 33, 35, 39, 45, 47, 51, 56, 58, 62, 64})) # Aronson's sequence
+# 'jaiibbcrauikf'
+
+print(decode_set('5'))
+# {0, 1, 2, 3, 4}
+
+print(decode_set('choices'))
+# {3, 7, 8, 9, 11, 12, 13, 16, 23, 27, 30, 33}

--- a/using-bitarray-to-represent-sets/example.py	Tue Jan 15 22:17:13 2013 +0900
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,50 +0,0 @@
-#!/usr/bin/env python
-
-import string
-from bitarray import bitarray
-
-
-PARTLEN = 5 # 5 bits per character
-CHARS = (string.ascii_lowercase + string.digits)[:2 ** PARTLEN]
-# 'abcdefghijklmnopqrstuvwxyz012345'
-
-
-PARTS = {}
-for i, char in enumerate(CHARS):
-    PARTS[char] = bitarray(bin(i).lstrip('-0b').rjust(PARTLEN, '0'), endian='big')
-# {
-#   'a': bitarray('00000'),
-#   ...
-#   '5': bitarray('11111')
-# }
-
-
-def encode_set(ids):
-    times, more = divmod(max(ids) + 1, PARTLEN)
-    length = PARTLEN * (times + bool(more))
-    ba = bitarray(length, endian='big')
-    ba.setall(0)
-    
-    for id in ids:
-        ba[id] = 1
-    
-    return ''.join(ba.decode(PARTS))
-
-
-def decode_set(string):
-    result = bitarray(endian='big')
-    result.encode(PARTS, string)
-    return set(result.search(bitarray('1')))
-
-
-print(encode_set({1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 15, 16})) # Buttons in an elevator in Shanghai
-# 'o52y'
-
-print(encode_set({1, 4, 11, 16, 24, 29, 33, 35, 39, 45, 47, 51, 56, 58, 62, 64})) # Aronson's sequence
-# 'jaiibbcrauikf'
-
-print(decode_set('5'))
-# {0, 1, 2, 3, 4}
-
-print(decode_set('choices'))
-# {3, 7, 8, 9, 11, 12, 13, 16, 23, 27, 30, 33}