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Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.
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Update
data.table v1.9.6+ now supports OP's original attempt and the following answer is no longer necessary.
You can use DT[order(-rank(x), y)].
x y v
1: c 1 7
2: c 3 8
3: c 6 9
4: b 1 1
5: b 3 2
6: b 6 3
7: a 1 4
8: a 3 5
9: a 6 6
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Loading custom configuration files
... I just want to open a config that is not related to an assembly. Just a standard .NET config file.
3 Answers
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Access key value from Web.config in Razor View-MVC3 ASP.NET
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What's the difference between @Anwar's answer and yours? Besides the naming ;)
– Nate-Wilkins
Oct 11 '13 at 16:40
21
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How to include a font .ttf using CSS?
... problem with my code. Because I want to include a global font for my page and I downloaded a .ttf file. And I include it in my main CSS but my font wont change.
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JavaScript: empty array, [ ] evaluates to true in conditional structures. Why is this?
...zero in quotes), "false" (false in quotes), empty functions, empty arrays, and empty objects.
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UIPopovercontroller dealloc reached while popover is still visible
...anaged by the presentation controller.
Code example (works both on iPhone and iPad):
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.allowsEditing = YES;
picker.modalPresentationSt...
ruby system command check exit code
I have a bunch of system calls in ruby such as the following and I want to check their exit codes simultaneously so that my script exits out if that command fails.
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Convert Enumeration to a Set/List
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I did a google search for "java convert enum into a set" and this thread came back as the first response. @Timur gets my upvote.
– ShellDude
Dec 29 '19 at 6:35
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Create a completed Task
I'm implementing a method Task<Result> StartSomeTask() and happen to know the result already before the method is called. How do I create a Task<T> that has already completed?
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Merge git repo into branch of another repo
Given repo Foo and repo Bar. I want to merge Bar with Foo, but only into a separate branch, called baz .
3 Answers
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