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Find the day of a week
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df = data.frame(date=c("2012-02-01", "2012-02-01", "2012-02-02"))
df$day <- weekdays(as.Date(df$date))
df
## date day
## 1 2012-02-01 Wednesday
## 2 2012-02-01 Wednesday
## 3 2012-02-02 Thursday
Edit: Just to show another way...
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Is it better practice to use String.format over string Concatenation in Java?
... localised and have the name and time tokens swapped without requiring a recompile of the executable to account for the different ordering. With argument positions you can also re-use the same argument without passing it into the function twice:
String.format("Hello %1$s, your name is %1$s and the ...
How to disable anchor “jump” when loading a page?
... my tabs, and then substringing the values by 1 char (str.slice(0,-1) when comparing them to window.location.hash This way the hashes are different and no jumping occurs.
– developer10
Apr 21 '14 at 20:44
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file_put_contents - failed to open stream: Permission denied
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The other option
is that you can make Apache (www-data), the owner of the folder
sudo chown -R www-data:www-data /var/www
that should make file_put_contents work now. But for more security you better also set the permissions like below
find /var/www -type d -print0 | xa...
Send message to specific client with socket.io and node.js
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Ivo, can you point to a more complete example or elaborate a bit? I'm eager to understand this approach, but I'm not sure I recognize the variables/objects you're using in this example. In clients[id] = {conn: clientConnect, data: {...}}, is clients[id] ...
What is the difference between `new Object()` and object literal notation?
...l notation prevents us from falling foul of this buffoonery.
(From http://www.jameswiseman.com/blog/2011/01/19/jslint-messages-use-the-object-literal-notation/)
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Generating statistics from Git repository [closed]
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Dec 1 '09 at 22:11
Jakub NarębskiJakub...
Windows batch file file download from a URL
I am trying to download a file from a website (ex. http://www.example.com/package.zip ) using a Windows batch file. I am getting an error code when I write the function below:
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How do I reattach to a detached mosh session?
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For security reasons, you can not reattach, see https://github.com/keithw/mosh/issues/394
To kill the detached session, use the PID number displayed in that message (that's the 'XXXX' part.) For example, if you see --
Mosh: You have a detached Mosh session on this server (mosh [12345])...
Nginx Different Domains on Same IP
...names.html.
They should be
server {
listen 80;
server_name www.domain1.com;
root /var/www/domain1;
}
server {
listen 80;
server_name www.domain2.com;
root /var/www/domain2;
}
Note, I have only included the relevant lines. Everything else looked okay but I jus...