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廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
[root@gfs_2 ~]# ssh-keygen -t rsa -P ''
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Your identification has been saved in /root/....
What is Hindley-Milner?
... of the length function: it can be "list of integers to integer", "list of strings to integer", "list of pairs to integer", and so on. In this case, a signal advantage of the Hindley-Milner system is that each well-typed term has a unique "best" type, which is called the principal type. The princi...
What is the difference between range and xrange functions in Python 2.X?
...e lists -- as you can see, time-wise, for a list of a million entries, the extra overhead is only 0.04 seconds. And as Corey points out, in Python 3.0 .xrange() will go away and .range() will give you nice iterator behavior anyway.
...
Really Cheap Command-Line Option Parsing in Ruby
...eractive, "Be interactive"
opt :filename, "File to process", :type => String
end
And that's it. opts is now a hash with keys :quiet, :interactive, and :filename. You can do whatever you want with it. And you get a beautiful help page, formatted to fit your screen width, automatic short argume...
Favorite Visual Studio keyboard shortcuts [closed]
...and keeps you in search mode (which means you can add or change the search string). The search box is for suckers!
– Aardvark
Oct 4 '08 at 19:59
9
...
Jar Mismatch Found 2 versions of android-support-v4.jar in the dependency list
...p #2: Pick one of those two versions of the JAR, or pick the one from the "extras" area of your SDK installation.
Step #3: Put the right JAR in App Library.
Step #4: Delete the one from App Free, since it will pick up that JAR from App Library.
You are welcome to instead have the same actual JAR ...
Combine two or more columns in a dataframe into a new column with a new name
...t for example is like: A - B instead of A-B. Is it possible to remove this extra space?
– Chetan Arvind Patil
Oct 6 '17 at 2:35
9
...
Is there an ignore command for git like there is for svn?
...
A very useful git ignore command comes with the awesome tj/git-extras.
Here are a few usage examples:
List all currently ignored patterns
git ignore
Add a pattern
git ignore "*.log"
Add one of the templates from gitignore.io
git ignore-io -a rails
git-extras provides many more...
C++11 rvalues and move semantics confusion (return statement)
... This is pretty huge for returning expensive objects like containers & strings by value efficiently from methods.
Now where things get interesting with rvalue references, is that you can also use them as arguments to normal functions. This allows you to write containers that have overloads for...
How to serve an image using nodejs
...
2016 Update
Examples with Express and without Express that actually work
This question is over 5 years old but every answer has some problems.
TL;DR
Scroll down for examples to serve an image with:
express.static
express
connect
http
net
All of the exa...