大约有 30,000 项符合查询结果(耗时:0.0433秒) [XML]

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

...rikes me is that you find R somewhat tedious (data manipulation, graphics, string manipulatio, etc ...). Well get prepared for many more surprises with the internal C API of R. This is very tedious. From time to time, I read the R-exts or R-ints manuals. This helps. But most of the time, when I re...
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CSS last-child selector: select last-element of specific class, not last child inside of parent?

...of a specific type of element. For that, you want :last-of-type http://jsfiddle.net/C23g6/3/ As per @BoltClock's comment, this is only checking for the last article element, not the last element with the class of .comment. body { background: black; } .comment { width: 470px; bord...
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Trying to start a service on boot on Android

I've been trying to start a service when a device boots up on android, but I cannot get it to work. I've looked at a number of links online but none of the code works. Am I forgetting something? ...
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How can I transition height: 0; to height: auto; using CSS?

I am trying to make a <ul> slide down using CSS transitions. 51 Answers 51 ...
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Set a path variable with spaces in the path in a Windows .cmd file or batch file

... I use set "VAR_NAME=<String With Spaces>" when updating path: set "PATH=%UTIL_DIR%;%PATH%" share | improve this answer | ...
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How to scroll to an element inside a div?

...en I click on it, it will force this div to scroll to view an element inside. I wrote its JavasSript like this: 16 Answer...
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How to set conditional breakpoints in Visual Studio?

...ght click, set condition, get "Condition for a breakpoint failed" error.. didn't you? – Toby Caulk Aug 1 '19 at 15:11 ...
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How do I check if I'm running on Windows in Python? [duplicate]

...s the system/OS name, e.g. 'Linux', 'Windows' or 'Java'. An empty string is returned if the value cannot be determined. If that isn't working, maybe try platform.win32_ver and if it doesn't raise an exception, you're on Windows; but I don't know if that's forward compatible to 64-bit, sin...
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How to select multiple files with ?

...lement. when you want to upload multiple file you should use array and not string as the value of the name attribute. ex: input type="file" name="myPhotos[]" multiple="multiple" and if you are using php then you will get the data in $_FILES and use var_dump($_FILES) and see output and do process...
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How to unit test a Node.js module that requires other modules and how to mock the global require fun

...ibly causes side effects (like the popular colors module which messes with String.prototype) – ThomasR Jan 3 '19 at 14:22 add a comment  |  ...