大约有 9,000 项符合查询结果（耗时：0.0367秒） [XML]
What does the “@” symbol mean in reference to lists in Haskell?
...
Yes, it's just syntactic sugar, with @ read aloud as "as". ps@(p:pt) gives you names for
the list: ps
the list's head : p
the list's tail: pt
Without the @, you'd have to choose between (1) or (2):(3).
This syntax actually works for any constructor; if you have data Tree a =...
Exposing a port on a live Docker container
...ner_ip:8000
To get the container's IP address, run the 2 commands:
docker ps
docker inspect container_name | grep IPAddress
Internally, Docker shells out to call iptables when you run an image, so maybe some variation on this will work.
To expose the container's port 8000 on your localhost's port ...
github: No supported authentication methods available
... if applicable
if [ -f "${SSH_ENV}" ]; then
. "${SSH_ENV}" > /dev/null
#ps ${SSH_AGENT_PID} doesn't work under cygwin
ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent$ > /dev/null || {
start_agent;
}
else
start_agent;
fi
...
Export a graph to .eps file with R
How do I export a graph to an .eps format file? I typically export my graphs to a .pdf file (using the 'pdf' function), and it works quite well. However, now I have to export to .eps files.
...
sbt-assembly: deduplication found error
...park" %% "spark-core" % "1.1.0" % "provided"
If needed, read more at
https://github.com/sbt/sbt-assembly#excluding-jars-and-files
share
|
improve this answer
|
follow
...
Start ssh-agent on login
...cable
if [ -f "${SSH_ENV}" ]; then
. "${SSH_ENV}" > /dev/null
#ps ${SSH_AGENT_PID} doesn't work under cywgin
ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent$ > /dev/null || {
start_agent;
}
else
start_agent;
fi
This version is especially nice since it will se...
Configuring Git over SSH to login once
...n my .profile and I have .bashrc source .profile:
. .agent > /dev/null
ps -p $SSH_AGENT_PID | grep ssh-agent > /dev/null || {
ssh-agent > .agent
. .agent > /dev/null
}
The .agent file is created automatically by the script; it contains the environment variables definit...
Execute a terminal command from a Cocoa app
...o include this magic line to keep NSLog working:
//The magic line that keeps your log where it belongs
task.standardOutput = pipe;
An explanation is here: https://web.archive.org/web/20141121094204/https://cocoadev.com/HowToPipeCommandsWithNSTask
...
proper way to sudo over ssh
...h to ssh:
ssh -t user@server "sudo script"
See man ssh:
-t Force pseudo-tty allocation. This can be used to execute arbi-
trary screen-based programs on a remote machine, which can be
very useful, e.g., when implementing menu services. Multiple -t
options force...