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How to sum a variable by group

...as "model Frequency by Category" or "Frequency depending on Category". Not all languages use a special operator to define a symbolic function, as done in R here. Perhaps with that "natural-language interpretation" of the tilde operator, it becomes more meaningful (and even intuitive). I personally f...
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Get all Attributes from a HTML element with Javascript/jQuery

I want to put all attributes in a Html element into an array: like i have a jQuery Object, whichs html looks like this: 17 ...
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jquery input select all on focus

I'm using this code to try and select all of the text in the field when a user focuses on the field. What happens is, it selects all for a second, then its unselected and the typing cursor is left where I clicked... ...
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How do I check that a Java String is not all whitespaces?

...ity of the question :) Also, I rarely use matches(): for performance, I usually store the Pattern in a final static. Pays off if the same code runs frequently. – Carl Smotricz Jul 14 '10 at 14:31 ...
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Delete empty lines using sed

... spaces or tabs in your "empty" line. Use POSIX classes with sed to remove all lines containing only whitespace: sed '/^[[:space:]]*$/d' A shorter version that uses ERE, for example with gnu sed: sed -r '/^\s*$/d' (Note that sed does NOT support PCRE.) ...
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Can jQuery get all CSS styles associated with an element?

Is there a way in jQuery to get all CSS from an existing element and apply it to another without listing them all? 5 Answer...
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How do I find the next commit in git? (child/children of ref)

... To list all the commits, starting from the current one, and then its child, and so on - basically standard git log, but going the other way in time, use something like git log --reverse --ancestry-path 894e8b4e93d8f3^..master wher...
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List all of the possible goals in Maven 2?

...d of the following phases: validate: validate the project is correct and all necessary information is available. compile: compile the source code of the project. test: test the compiled source code using a suitable unit testing framework. These tests should not require the code be packaged or depl...
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What is the shortcut to Auto import all in Android Studio?

... and make the following changes: change Insert imports on paste value to All markAdd unambigious imports on the fly option as checked On a Mac, do the same thing in Android Studio -> Preferences After this, all unambiguous imports will be added automatically. ...
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Transferring ownership of an iPhone app on the app store

... Starting June 11, 2013 this has officially become possible. Here's the official note: Dear developer, Apps can now be transferred from one developer to another within iTunes Connect, for example after an acquisition or when a distribution deal expires. Transf...