大约有 43,000 项符合查询结果（耗时：0.0520秒） [XML]
Find all packages installed with easy_install/pip?
...way to find all Python PyPI packages that were installed with easy_install or pip? I mean, excluding everything that was/is installed with the distributions tools (in this case apt-get on Debian).
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Byte order mark screws up file reading in Java
I'm trying to read CSV files using Java. Some of the files may have a byte order mark in the beginning, but not all. When present, the byte order gets read along with the rest of the first line, thus causing problems with string compares.
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How to send a simple string between two programs using pipes?
... vanish when the last process closes it.
A named pipe, also called a FIFO for its behavior, can be used to connect two unrelated processes and exists independently of the processes; meaning it can exist even if no one is using it. A FIFO is created using the mkfifo() library function.
Example
write...
CURL alternative in Python
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import urllib2
manager = urllib2.HTTPPasswordMgrWithDefaultRealm()
manager.add_password(None, 'https://app.streamsend.com/emails', 'login', 'key')
handler = urllib2.HTTPBasicAuthHandler(manager)
director = urllib2.OpenerDirect...
Android - Spacing between CheckBox and text
...hardcoding a value, since different devices could use different drawables for the checkbox.
UPDATE - As people have recently mentioned in answers below, this behavior has apparently changed in Jelly Bean (4.2). Your app will need to check which version its running on, and use the appropriate met...
numpy: most efficient frequency counts for unique values in an array
In numpy / scipy , is there an efficient way to get frequency counts for unique values in an array?
16 Answers
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Ruby Bundle Symbol not found: _SSLv2_client_method (LoadError)
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@twelve17 The errors are related to not being able to find an SSL library and the OP mentioned that they had recently upgraded their installed version of openssl. I had the same issue with the same upgrade scenario; I suspect the reinstall fi...
What is :: (double colon) in Python when subscripting sequences?
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it means 'nothing for the first argument, nothing for the second, and jump by three'. It gets every third item of the sequence sliced.
Extended slices is what you want. New in Python 2.3
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Passing an integer by reference in Python
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It doesn't quite work that way in Python. Python passes references to objects. Inside your function you have an object -- You're free to mutate that object (if possible). However, integers are immutable. One workaround is to pass the integer i...
Why is isNaN(null) == false in JS?
...semantically it's referring specifically to the value NaN. From Wikipedia for NaN:
NaN (Not a Number) is a value of the numeric data type representing an undefined or unrepresentable value, especially in floating-point calculations.
In most cases we think the answer to "is null numeric?" shou...