大约有 46,000 项符合查询结果(耗时:0.0756秒) [XML]

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What's the difference between lapply and do.call?

I'm learning R recently and confused by two function: lapply and do.call . It seems that they're just similar to map function in Lisp. But why are there two functions with such a different name? Why doesn't R just use a function called map ? ...
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How to get the selected radio button’s value?

... I just want to find the value of the radio button (which one is selected) and return it to a variable. For some reason it keeps returning undefined . ...
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How Do I Take a Screen Shot of a UIView?

... it solved my problem. I was using the old version and it was giving me loads of errors! Thanks a million – apinho Oct 20 '15 at 9:54 ...
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PhoneGap: Detect if running on desktop browser

...developing a web application that uses PhoneGap:Build for a mobile version and want to have a single codebase for the 'desktop' and mobile versions. I want to be able to detect if PhoneGap calls will work (ie, is the user on a mobile device that will support PhoneGap). ...
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Testing service in Angular returns module is not defined

... Note that angular.module and angular.mock.module are not the same. The window.module function is an alias for angular.mock.module. See this answer for more. – Tim Schaub Jan 5 '13 at 1:41 ...
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What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?

... the difference between __PRETTY_FUNCTION__ , __FUNCTION__ , __func__ , and where are they documented? How do I decide which one to use? ...
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Opposite of %in%: exclude rows with values specified in a vector

... to Z. I want to create a subset D2, which excludes some values, say, B, N and T. Basically, I want a command which is the opposite of %in% ...
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How can I give eclipse more memory than 512M?

I have following setup, but when I put 1024 and replace all 512 with 1024, then eclipse won't start at all. How can I have more than 512M memory for my eclipse JVM? ...
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How do I import other TypeScript files?

...Validator = new ZipCodeValidator(); https://www.typescriptlang.org/docs/handbook/modules.html Old answer: From TypeScript version 1.5 you can use tsconfig.json: http://www.typescriptlang.org/docs/handbook/tsconfig-json.html It completely eliminates the need of the comment style referencing. Old...
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possibly undefined macro: AC_MSG_ERROR

... I had this same issue and found that pkg-config package was missing. After installing the package, everything generated correctly. share | impro...