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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...
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 to remove “onclick” with JQuery?
...
Old Way (pre-1.7):
$("...").attr("onclick", "").unbind("click");
New Way (1.7+):
$("...").prop("onclick", null).off("click");
(Replace ... with the selector you need.)
// use the "[attr=value]" syntax to avoid syntax errors wit...
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...
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 '...
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...
Throttling method calls to M requests in N seconds
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14 Answers
14
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Mathematical functions in Swift
... easily discover your playground platform by opening File Inspector (⌥⌘1).
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How do I daemonize an arbitrary script in unix?
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12 Answers
12
Active
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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...