大约有 31,500 项符合查询结果（耗时：0.0452秒） [XML]
Does Python SciPy need BLAS?
...
The SciPy webpage used to provide build and installation instructions, but the instructions there now rely on OS binary distributions. To build SciPy (and NumPy) on operating systems without precompiled packages of the required libraries, you must build and then statically...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
...he CPU would have to wait on. The register renaming mechanism would essentially be defeated if it wasn't done that way.
This way you can write fast code using 32-bit values in 64-bit mode without having to explicitly break dependencies all the time. Without this behaviour, every single 32-bit instr...
Debugging WebSocket in Google Chrome
... Would you know how to use Wireshark to do this? I've never really used it, and it appears to show all network traffic, and shows raw packets.
– mellowsoon
Apr 27 '11 at 14:11
...
Full-screen iframe with a height of 100%
Is iframe height=100% supported in all browsers?
17 Answers
17
...
Get a filtered list of files in a directory
...t a list of files in a directory using Python, but I do not want a list of ALL the files.
14 Answers
...
How do I select the “last child” with a specific class name in CSS? [duplicate]
...
This doesnt at all answer the question, did you even read it? He's asking for how to do it without specifically having to add another class for the last element, that's the entire beauty of the :last-child selector. This shouldnt be an acce...
PostgreSQL: How to make “case-insensitive” query
...a. But there are two problems with that.
It works in English, but not in all languages. (Maybe not even in
most languages.) Not every lowercase letter has a corresponding
uppercase letter; not every uppercase letter has a corresponding
lowercase letter.
Using functions like lower() and upper() wil...
“Invalid signature file” when attempting to run a .jar
...nch more files to the jar, and thus the signature is not correct. If you really wanted, you could re-sign the new jar, but of course it would be with your signature, not the old one. Alternatively, you could not distribute the uber jar, but instead include the signed jar as a separate file, but then...
How to check if a column exists in Pandas
...
To check if one or more columns all exist, you can use set.issubset, as in:
if set(['A','C']).issubset(df.columns):
df['sum'] = df['A'] + df['C']
As @brianpck points out in a comment, set([]) can alternatively be constructed with curly...
Alternative timestamping services for Authenticode
We perform code signing and timestamping for all our production builds. Occasionally (usually when we are about to RTM (!)) the timestamp server at Verisign (" http://timestamp.verisign.com/scripts/timstamp.dll ") decides to go offline intermittently.
...