大约有 35,800 项符合查询结果（耗时：0.0548秒） [XML]
What does .SD stand for in data.table in R
...
206
.SD stands for something like "Subset of Data.table". There's no significance to the initial "....
Does Ruby have a string.startswith(“abc”) built in method?
...
340
It's called String#start_with?, not String#startswith: In Ruby, the names of boolean-ish methods...
Visual Studio, Find and replace, regex
...<whatever.h> using find and replace functionality in Visual Studio 2005. I used the regex \#include \"[a-z\.h]+\" to find the include statement. But I am wondering how frame the replace regex.
...
How to find the JVM version from a program?
...
10 Answers
10
Active
...
How to check if running as root in a bash script
...
430
The $EUID environment variable holds the current user's UID. Root's UID is 0. Use something like...
Which terminal command to get just IP address and nothing else?
...
You can write a script that only return the IP like:
/sbin/ifconfig eth0 | grep 'inet addr' | cut -d: -f2 | awk '{print $1}'
For MAC:
ifconfig | grep "inet " | grep -v 127.0.0.1 | cut -d\ -f2
Or for linux system
hostname -i | awk '{print $3}' # Ubuntu
hostname -i # Debian
...
How to run only one task in ansible playbook?
...
You may also apply tags to roles:
roles:
- { role: webserver, port: 5000, tags: [ 'web', 'foo' ] }
And you may also tag basic include statements:
- include: foo.yml tags=web,foo
Both of these have the function of tagging every single task inside the include statement.
...
What should a Multipart HTTP request with multiple files look like? [duplicate]
... dot (".").
POST /cgi-bin/qtest HTTP/1.1
Host: aram
User-Agent: Mozilla/5.0 Gecko/2009042316 Firefox/3.0.10
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive...
How to remove an element from an array in Swift
... without the elements you want removed, e.g:
let pets = animals.filter { $0 != "chimps" }
share
|
improve this answer
|
follow
|
...
How to put comments in Django templates
...
answered Apr 6 '09 at 0:13
Van GaleVan Gale
40.8k99 gold badges6565 silver badges7878 bronze badges
...