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Where can I learn how to write C code to speed up slow R functions? [closed]

...trived example). Edit 3: There is complexity in that you may run into C++ errors that are, to put it mildly, hard to grok. But to just use Rcpp rather than to extend it, you should hardly ever need it. And while this cost is undeniable, it is far eclipsed by the benefit of simpler code, less boil...
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How to override to_json in Rails?

... You are getting ArgumentError: wrong number of arguments (1 for 0) because to_json needs to be overridden with one parameter, the options hash. def to_json(options) ... end Longer explanation of to_json, as_json, and rendering: In ActiveSupp...
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How to include (source) R script in other scripts

... exists() seems to throw an error except of returning one in R 3.0.2. – Michael Schubert Dec 5 '13 at 10:52 ...
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Can I use my existing git repo with openshift?

... You have an error. You can have multiple repositories, but they both can't be named "origin". They must be unique, like: origin and origin2 – Eric P Sep 22 '15 at 13:07 ...
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How to prevent buttons from submitting forms

...ys work in Firefox for me. If the js is complicated enough, and there's an error Firefox will submit the form anyway. Insanity! – Matthew Lock Oct 12 '12 at 10:08 1 ...
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How do I make an attributed string using Swift?

...offeeTypeFaceAttributes) When I set my UILabel.text = coffeeText I get an error "NSMutableAttributedString is not convertable to 'String'. Is there a way to make the UILabel accept NSMutableAttributedString? – dcbenji Jul 10 '14 at 4:25 ...
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Expand/collapse section in UITableView in iOS

...t as soon as i had more, i get the "invalid update invalid number of rows" error. i know this solution is older, but will this only work for one section? if we have more than one section, will we need to add the code that actually adds/deletes the rows?? – skinsfan00atg ...
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Entity framework linq query Include() multiple children entities

...xt node (NB: This does NOT work with AsNoTracking() - you'll get a runtime error): var company = context.Companies .Include(co => co.Employees .Select(emp => emp.Employee_Car .Select(ec => ec.Employee) .Select(e...
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How to convert an enum type variable to a string?

...n an array, and to set the compiler switches in the build file to issue an error for a switch over an enum that doesn't cover all possible values. Adding a new enum entry without updating the relevant switch statements will cause a compilation error. – divegeek ...
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Can you call ko.applyBindings to bind a partial view?

...hat is called when I apply the global ko.applyBindings(). So now I get the error "You cannot apply bindings multiple times to the same element.". I'm still trying to figure out why I get the error. Can't we apply a binding to the same variable multiple times, each to different elements? ...