大约有 38,000 项符合查询结果（耗时：0.0288秒） [XML]
Postgres - FATAL: database files are incompatible with server
... |
edited Feb 25 at 9:59
answered Dec 12 '18 at 14:58
...
Selecting with complex criteria from pandas.DataFrame
...rom random import randint
>>> df = pd.DataFrame({'A': [randint(1, 9) for x in range(10)],
'B': [randint(1, 9)*10 for x in range(10)],
'C': [randint(1, 9)*100 for x in range(10)]})
>>> df
A B C
0 9 40 300
1 9 70 700
2 5 70 900
3...
`require': no such file to load — mkmf (LoadError)
I was trying to install rails on Ubuntu Natty Narwhal 11.04, using ruby1.9.1.
10 Answers
...
“Code too large” compilation error in Java
...
92
A single method in a Java class may be at most 64KB of bytecode.
But you should clean this...
Extracting specific columns in numpy array
...
9 Answers
9
Active
...
How to get last items of a list in Python?
I need the last 9 numbers of a list and I'm sure there is a way to do it with slicing, but I can't seem to get it. I can get the first 9 like this:
...
Regular expression that matches valid IPv6 addresses
...match:
IPv6 addresses
zero compressed IPv6 addresses (section 2.2 of rfc5952)
link-local IPv6 addresses with zone index (section 11 of rfc4007)
IPv4-Embedded IPv6 Address (section 2 of rfc6052)
IPv4-mapped IPv6 addresses (section 2.1 of rfc2765)
IPv4-translated addresses (section 2.1 of rfc2765)
...
How is “int* ptr = int()” value initialization not illegal?
...
answered Nov 9 '11 at 16:14
Jerry CoffinJerry Coffin
422k6666 gold badges554554 silver badges10091009 bronze badges
...
Detect IE version (prior to v9) in JavaScript
... an error page if they're using a version of Internet Explorer prior to v9. It's just not worth our time and money to support IE pre-v9 . Users of all other non-IE browsers are fine and shouldn't be bounced. Here's the proposed code:
...
How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?
My current version of ruby is ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-darwin10.5.0] but I want to update it to the latest patch level using rvm. How can I do this?
...