大约有 43,700 项符合查询结果(耗时:0.0433秒) [XML]
Sorting multiple keys with Unix sort
...
Use the -k option (or --key=POS1[,POS2]). It can appear multiple times and each key can have global options (such as n for numeric sort)
share
|
improve this a...
Validating IPv4 addresses with regexp
...idation, but without much luck. It seemed at one point I had had it with (25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?(\.|$)){4} , but it produces some strange results:
...
Split (explode) pandas dataframe string entry to separate rows
...
22 Answers
22
Active
...
FFMPEG (libx264) “height not divisible by 2”
...ing to encode a .mp4 video from a set of frames using FFMPEG using the libx264 codec.
7 Answers
...
Is it possible to install another version of Python to Virtualenv?
I have a shared account in a web-hosting that has Python 2.4 installed, but my code is not compatible with 2.4. Is it possible to install Python 2.6 directly to Virtualenv?
...
What's the difference between tilde(~) and caret(^) in package.json?
...u to all future patch versions, without incrementing the minor version. ~1.2.3 will use releases from 1.2.3 to <1.3.0.
^version “Compatible with version”, will update you to all future minor/patch versions, without incrementing the major version. ^2.3.4 will use releases from 2.3.4 to <3....
What to do about Eclipse's “No repository found containing: …” error messages?
...'s Helios EE bundle on Linux to which I added the subversive plugins, the m2e Maven integration and the Mylin connector for Trac. For the last couple of weeks I've been trying to install updates, and every time I get back a message like
...
In the shell, what does “ 2>&1 ” mean?
...
2671
File descriptor 1 is the standard output (stdout).
File descriptor 2 is the standard error (s...
Replace all 0 values to NA
...
252
Replacing all zeroes to NA:
df[df == 0] <- NA
Explanation
1. It is not NULL what you ...