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Check if a string contains a substring in SQL Server 2005, using a stored procedure
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401
CHARINDEX() searches for a substring within a larger string, and returns the position of the mat...
Postgresql SELECT if string contains
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137
You should use 'tag_name' outside of quotes; then its interpreted as a field of the record. Co...
How do you update Xcode on OSX to the latest version?
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11 Answers
11
Active
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mongodb: insert if not exists
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157
Sounds like you want to do an "upsert". MongoDB has built-in support for this. Pass an extra...
Hexadecimal To Decimal in Shell Script
... to do it in the shell or with an external program:
With bash:
$ echo $((16#FF))
255
with bc:
$ echo "ibase=16; FF" | bc
255
with perl:
$ perl -le 'print hex("FF");'
255
with printf :
$ printf "%d\n" 0xFF
255
with python:
$ python -c 'print(int("FF", 16))'
255
with ruby:
$ ruby -e '...
Read user input inside a loop
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107
Read from the controlling terminal device:
read input </dev/tty
more info: http://compgr...
Elegant setup of Python logging in Django
...logging. (Note: NullHandler is already in the logging package for Python 3.1, and will be in Python 2.7.) So:
logger = logging.getLogger(__name__)
logger.addHandler(someutils.null_handler)
This is done to ensure that your modules play nicely in a site which doesn't configure logging in settings.p...
Converting from a string to boolean in Python?
...e'
Or to checks against a whole bunch of values:
s.lower() in ['true', '1', 't', 'y', 'yes', 'yeah', 'yup', 'certainly', 'uh-huh']
Be cautious when using the following:
>>> bool("foo")
True
>>> bool("")
False
Empty strings evaluate to False, but everything else evaluates to...
How do I daemonize an arbitrary script in unix?
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12 Answers
12
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How do I add a path to PYTHONPATH in virtualenv
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157
You can usually avoid having to do anything with PYTHONPATH by using .pth files. Just put a fi...