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Installing libv8 gem on OS X 10.9+
...mfile (or) a bundle update should suffice. Hope this helps.
From the libv8 README
Bring your own V8
Because libv8 is the interface for the V8 engine used by therubyracer, you may need to use libv8, even if you have V8 installed already. If you wish to use your own V8 installation, rather than have i...
cleanest way to skip a foreach if array is empty [duplicate]
...remove any lines, but the code is much more self documenting and easier to read.
– Peter Ajtai
Aug 10 '10 at 7:29
5
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Exit Shell Script Based on Process Exit Code
...d was interrupted by a SIGPIPE signal when
head -1 terminated after having read one line.
To know the exit status of the elements of a pipeline
cmd1 | cmd2 | cmd3
a. with zsh:
The exit codes are provided in the pipestatus special array.
cmd1 exit code is in $pipestatus[1], cmd3 exit code in
...
How to determine a user's IP address in node
...is usually works well but for some reason I recently got the error "Cannot read property 'remoteAddress' of undefined" because apparently everything was null/undefined, including req.connection.socket. I'm not sure why/what conditions cause that to be the case but it would be good to check that req....
Logical operators for boolean indexing in Pandas
...A B C
1 3 7 9
2 3 5 2
3 4 7 6
If you haven't yet, please also read the section on Logical AND above, all caveats apply here.
Alternatively, this operation can be specified with
df[df['A'].eq(3) | df['B'].eq(7)]
A B C
1 3 7 9
2 3 5 2
3 4 7 6
operator.or_
Calls Series....
How should I escape strings in JSON?
... to use one (I wouldn't suggest this¹), or you're writing a JSON library, read on.
Escape it according to the RFC. JSON is pretty liberal: The only characters you must escape are \, ", and control codes (anything less than U+0020).
This structure of escaping is specific to JSON. You'll need a JSO...
nginx - nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)
...ion - commenting the line that contains listen 80; in that same template already solves the problem and correctly so. Your trick works but it's not what I would future readers of your question to do. That's why I suggest you select @Nathan's answer as the correct answer.
– Oliv...
Why does Java switch on contiguous ints appear to run faster with added cases?
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@Aniket: Read this article of wikipedia. en.wikipedia.org/wiki/Branch_table
– Vishal K
Mar 25 '13 at 17:39
14
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Do we need semicolon at the end? [duplicate]
...
There was an interesting thread recently on the node.js mailing list that's worth a read: groups.google.com/group/nodejs/browse_thread/thread/…. Check out Isaac Schlueter's coding style; it's an interesting way to take advantage of ASI -- it's not n...
Origin is not allowed by Access-Control-Allow-Origin
...
read the answer: you can simply add this argument to your Chrome launcher. There is no setting for this inside Chrome
– Travis Webb
Mar 6 '13 at 16:43
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