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List tables in a PostgreSQL schema
...n use regular-expression notations such as character classes, for example [0-9] to match any digit. All regular expression special characters work as specified in Section 9.7.3, except for . which is taken as a separator as mentioned above, * which is translated to the regular-expression notation .*...
How to install Xcode Command Line Tools
...t the command-line build tools installed with the current Xcode/Mac OS X v10.8 (Mountain Lion) or later?
13 Answers
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How do I decode a base64 encoded string?
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660
Simple:
byte[] data = Convert.FromBase64String(encodedString);
string decodedString = Encoding....
How to generate all permutations of a list?
...:
for i in range(len(elements)):
# nb elements[0:1] works in both string and list contexts
yield perm[:i] + elements[0:1] + perm[i:]
A couple of alternative approaches are listed in the documentation of itertools.permutations. Here's one:
def permutatio...
What does git push -u mean?
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answered Apr 6 '11 at 4:06
Rafe KettlerRafe Kettler
66.2k1717 gold badges143143 silver badges145145 bronze badges
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Difference between dispatch_async and dispatch_sync on serial queue?
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410
Yes. Using serial queue ensure the serial execution of tasks. The only difference is that dispat...
Class method decorator with self arguments?
...e:
def check_authorization(f):
def wrapper(*args):
print args[0].url
return f(*args)
return wrapper
class Client(object):
def __init__(self, url):
self.url = url
@check_authorization
def get(self):
print 'get'
>>> Client('http://www.go...
onNewIntent() lifecycle and registered listeners
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+50
onNewIntent() is meant as entry point for singleTop activities which already run somewhere else in the stack and therefore can't call ...
lock(new object()) — Cargo cult or some crazy “language special case”?
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edited Aug 20 '12 at 13:43
sehe
311k4040 gold badges395395 silver badges534534 bronze badges
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How to negate the whole regex?
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102
Use negative lookaround: (?!pattern)
Positive lookarounds can be used to assert that a pattern...