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Is there a unique Android device ID?
Do Android devices have a unique ID, and if so, what is a simple way to access it using Java?
52 Answers
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Pass a data.frame column name to a function
...all foo() like this:
foo(dat,z,x,y)
The problem here is that df$col1 doesn't evaluate the expression col1. It simply looks for a column in df literally called col1. This behavior is described in ?Extract under the section "Recursive (list-like) Objects".
The simplest, and most often recommend...
What is the difference between partitioning and bucketing a table in Hive ?
...ies. Other drawback is having too many partitions is the large number of Hadoop files and directories that are created unnecessarily and overhead to NameNode since it must keep all metadata for the file system in memory.
Bucketing is another technique for decomposing data sets into more manageable p...
App Inventor 2 扩展 · App Inventor 2 中文网
...n be distributed on the Web and loaded into App Inventor dynamically: they do not have to be built into the App Inventor system, and they can be imported into projects as needed. With extensions, the range of App Inventor apps can be virtually unlimited.
One use of extensions, for example, is for...
Lightweight XML Viewer that can handle large files [closed]
...avyweight" tools such as XmlSpy, which are good for prodding around in xml docs - but often (very often in some cases!) you just want to quickly open and browse an xml doc, and have it pretty printed. Possibly with some basic search functionality (textual is probably fine).
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psql: FATAL: database “” does not exist
...r, which I think is what you are looking for. If createdb fails, then you don't have enough rights to make your own database, and you will have to figure out how to fix the homebrew package.
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Modern way to filter STL container?
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@usr Its IMO syntactic sugar, a simple for loop does the job aswell (and often allows one to avoid copying).
– Sebastian Hoffmann
Jan 18 '14 at 15:47
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How to “warm-up” Entity Framework? When does it get “cold”?
...ion. Especially, for those queries that take very long to compile and that don't change. That way you move the performance overhead from runtime to compile time. Also this won't introduce any lag. But of course this change goes through to the database, so it's not so easy to deal with. Code is more ...
Alternative to iFrames with HTML5
...alternative to iFrames with HTML5.
I mean by that, be able to inject cross-domains HTML inside of a webpage without using an iFrame.
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File Upload without Form
...ry. The input tag is not inside any form tag. It stands individually. So I don't want to use jQuery plugins like 'ajaxForm' or 'ajaxSubmit'.
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