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How to reshape data from long to wide format
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And, as of data.table v1.9.6 we can cast on multiple columns
## add an extra column
dat1[, value2 := value * 2]
## cast multiple value columns
dcast(dat1, name ~ numbers, value.var = c("value", "value2"))
# name value_1 value_2 value_3 value_4 value2_1 value2_2 value2_3 ...
How are Anonymous inner classes used in Java?
...r class can come useful when making an instance of an object with certain "extras" such as overriding methods, without having to actually subclass a class.
I tend to use it as a shortcut for attaching an event listener:
button.addActionListener(new ActionListener() {
@Override
public void ...
CSV new-line character seen in unquoted field error
...lines version (which is very cools thanks) I get coercing to Unicode: need string or buffer, S3BotoStorageFile found
– GrantU
Jun 26 '13 at 9:21
4
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How can I embed a YouTube video on GitHub wiki pages?
...Everything Is AWESOME")
Clear Advantages
While this requires a couple of extra steps (a) taking the screenshot of the video and (b) uploading it so you can use the image as your thumbnail it does have 3 clear advantages:
The person reading your markdown (or resulting html page) has a visual cue t...
GitHub: Reopening a merged pull request
I've now fixed the bug and want to resubmit the pull request with 1 extra commit. Is there any way to reopen the pull request or update it, or do I have to create a new pull request, type out the description etc again? Gitorious has this feature and we've recently moved to GitHub.
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Regular expressions in an Objective-C Cocoa application
...to your project.
(My complaint against RegExKitLite is that it extends NSString via category, but it can be considered as a feature too. Also it uses the nonpublic ICU libraries shipped with the OS, which isn't recommended by Apple.)
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How do I represent a time only value in .NET?
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TimeSpan timeSpan = new TimeSpan(2, 14, 18);
Console.WriteLine(timeSpan.ToString()); // Displays "02:14:18".
[Edit]
Considering the other answers and the edit to the question, I would still use TimeSpan. No point in creating a new structure where an existing one from the framework suffice.
On...
Play an audio file using jQuery when a button is clicked
...thing for non-media elements so it doesn't seem like it would be worth the extra bytes it would take.
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Why should text files end with a newline?
....opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_397
A string as:
A contiguous sequence of bytes terminated by and including the first null byte.
Source: https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_396
From this then, we can derive that ...
Difference between WebStorm and PHPStorm
...upport JS part like Webstorm
That's not correct (your wording). Missing "extra" technology in PhpStorm (for example: node, angularjs) does not mean that basic JavaScript support has missing functionality. Any "extras" can be easily installed (or deactivated, if not required).
UPDATE (2016-12-13...