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How to learn R as a programming language [closed]
I'd like to know how to learn the R language as as 'programming' language as opposed to learning it as a statistical system. My question is prompted by lack of understanding of such functions as parse, eval, etc. which may not find frequent use by an R user with a 'statistics' persuasion.
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How can I round up the time to the nearest X minutes?
Is there a simple function for rounding UP a DateTime to the nearest 15 minutes?
13 Answers
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What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
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TryGetValue will be faster.
ContainsKey uses the same check as TryGetValue, which internally refers to the actual entry location. The Item property actually has nearly identical code functionality as TryGetValue, except that it will throw an exception inste...
CMake使用教程 - C/C++ - 清泛网 - 专注C/C++及内核技术
...以通过make命令构建项目生成目标文件，还支持安装（make install）、测试安装的程序是否能正确执行（make test，或者ctest）、生成当前平台的安装包（make package）、生成源码包（make package_source）、产生Dashboard显示数据并上传等高...
How to check if a variable is null or empty string or all whitespace in JavaScript?
...es, "white space" encompasses more than null, spaces or blank my answer is intended to answer op's specific question. This is important because op may NOT want to catch things like tabs, for example.
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The most accurate way to check JS object's type?
The typeof operator doesn't really help us to find the real type of an object.
8 Answers
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What is the most efficient way to deep clone an object in JavaScript?
...ent way to clone a JavaScript object? I've seen obj = eval(uneval(o)); being used, but that's non-standard and only supported by Firefox . I've done things like obj = JSON.parse(JSON.stringify(o)); but question the efficiency. I've also seen recursive copying functions with various flaws...
How to access a mobile's camera from a web app?
In my web app (not native app) for mobiles, I want to take a photo and upload it, but I don't want to use Adobe Flash. Is there any way to do this?
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Why does Path.Combine not properly concatenate filenames that start with Path.DirectorySeparatorChar
From the Immediate Window in Visual Studio:
16 Answers
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PHP - Debugging Curl
I'd like to see what the post fields in the request are before I send it. (For debugging purposes).
8 Answers
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