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Select multiple columns in data.table by their numeric indices
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It's a bit verbose, but i've gotten used to using the hidden .SD variable.
b<-data.table(a=1,b=2,c=3,d=4)
b[,.SD,.SDcols=c(1:2)]
It's a bit of a hassle, but you don't lose out on other data.table features (I don't think), so you should still be able to use other important ...
Can I embed a custom font in an iPhone application?
...key in their Info.plist file. The value of this key is an array of strings identifying the font files in the application’s bundle. When the system sees the key, it loads the specified fonts and makes them available to the application.
Once the fonts have been set in the Info.plist, you can use y...
How do I verify that an Android apk is signed with a release certificate?
How can I check that an Android apk is signed with a release and not debug cert?
5 Answers
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MIME type warning in chrome for png images
...S Express and confirmed the warning went away.
– patridge
May 26 '11 at 18:16
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What does 'useLegacyV2RuntimeActivationPolicy' do in the .NET 4 config?
...e of the recent problems we’ve seen is that, because of the support for side-by-side runtimes, .NET 4.0 has changed the way that it binds to older mixed-mode assemblies. These assemblies are, for example, those that are compiled from C++\CLI. Currently available DirectX assemblies are mixed mode. ...
PHP: How to handle
... No, PHP skips CDATA completely for some reason. Any other ideas?
– Angelo
Jun 4 '10 at 0:24
4
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What is the syntax to insert one list into another list in python?
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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Bower and devDependencies vs dependencies
...portant information
-s, --silent Do not output anything, besides errors
-V, --verbose Makes output more verbose
--allow-root Allows running commands as root
See 'bower help <command>' for more information on a specific command.
and further, bower ...
Simplest way to read json from a URL in java
...eturn json;
} finally {
is.close();
}
}
public static void main(String[] args) throws IOException, JSONException {
JSONObject json = readJsonFromUrl("https://graph.facebook.com/19292868552");
System.out.println(json.toString());
System.out.println(json.get("id"));
}
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What do I return if the return type of a method is Void? (Not void!)
...of Generics in Java I ended up in having to implement a function having Void as return type:
6 Answers
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