大约有 45,000 项符合查询结果（耗时：0.0396秒） [XML]
Django set default form values
...nts without you needing to do anything extra). Personally, I prefer to specify default values in the form definition and only use the initial=... mechanism if the desired default is a dynamic value (e.g. something entered by a user, or based on their login, geographical location, etc.)
...
Finding all possible combinations of numbers to reach a given sum
...subset_sum(numbers, target, partial=[]):
s = sum(partial)
# check if the partial sum is equals to target
if s == target:
print "sum(%s)=%s" % (partial, target)
if s >= target:
return # if we reach the number why bother to continue
for i in range(len(numbers...
Write applications in C or C++ for Android? [closed]
...ts Java, but I'm sure there must be a way to get a C app on there, anyone knows of a way to accomplish this?
20 Answers
...
How to make a python, command-line program autocomplete arbitrary things NOT interpreter
...t readline
def completer(text, state):
options = [i for i in commands if i.startswith(text)]
if state < len(options):
return options[state]
else:
return None
readline.parse_and_bind("tab: complete")
readline.set_completer(completer)
The official module docs aren't ...
How do I get jQuery to select elements with a . (period) in their ID?
...you query an element with ID Address and class State (granted that if you know the ID you aren't adding much by specifying the class, but it should still be valid, I'd think)?
– bdukes
Mar 25 '09 at 13:12
...
What is a good regular expression to match a URL? [duplicate]
...
Regex if you want to ensure URL starts with HTTP/HTTPS:
https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)
If you do not require HTTP protocol:
[-a-zA-Z0-9@:%._\+~#=]{1,256...
TypeError: 'NoneType' object is not iterable in Python
... return empty list at least. This exception never helped anyone in real life other than making us insert few ugly if data is not None: kind of handling.
– nehem
Sep 1 '17 at 6:59
...
Developing C# on Linux
I'd like to know if there are effective and open source tools to develop C# applications on Linux (Ubuntu). In particular, I have to develop Windows Forms applications.
...
Format floats with standard json module
...e FLOAT_REPR so that EVERY representation of a float is under your control if you wish it to be; but unfortunately that's not how the json package was designed:-(.
share
|
improve this answer
...
How to get indices of a sorted array in Python
...
If you are using numpy, you have the argsort() function available:
>>> import numpy
>>> numpy.argsort(myList)
array([0, 1, 2, 4, 3])
http://docs.scipy.org/doc/numpy/reference/generated/numpy.argsort.html
...