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What is your preferred style for naming variables in R? [closed]
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Good previous answers so just a little to add here:
underscores are really annoying for ESS users; given that ESS is pretty widely used you won't see many underscores in code authored by ESS users (and that set includes a bunch of R Core as well as CRAN authors, excptions like Hadley notwithsta...
What does the Ellipsis object do?
While idly surfing the namespace I noticed an odd looking object called Ellipsis , it does not seem to be or do anything special, but it's a globally available builtin.
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How to show first commit by 'git log'?
...parents was introduced after this answer was posted.)
Explanation
Technically, there may be more than one root commit. This happens when multiple previously independent histories are merged together. It is common when a project is integrated via a subtree merge.
The git.git repository has six roo...
What is Lazy Loading?
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It's called lazy loading because, like a lazy person, you are putting off doing something you don't want to. The opposite is Eager Loading, where you load something right away, long before you need it.
If you are curious why peop...
Error 908: Permission RECEIVE_SMS has been denied. - App Inventor 2 中...
...发送短信/拨打电话，我们创建了SendMessageDirect和MakePhoneCallDirect模块，执行旧的需要额外权限的行为。我们选择让现有的SendMessage和MakePhoneCall模块通过Intents启动默认应用程序，这是Google政策推荐的做法，对大多数人应该有效。
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How to set Java environment path in Ubuntu
I just installed JDK in Ubuntu with sudo apt-get install openjdk-6-jdk command,
after the installation where's the Java bin directory located? And how can I set the environment path for that directory? I have little experience with Ubuntu, can anyone give some advice or suggest any good website ...
Convert XML to JSON (and back) using Javascript
...cts) and vice versa javascript conversion functions. The library is very small and doesn't require any other additional libraries.
API functions
new X2JS() - to create your instance to access all library functionality. Also you could specify optional configuration options here
X2JS.xml2json - Conve...
Using XPATH to search text containing
...the text from OpenQA concerning this issue (found here):
HTML automatically normalizes
whitespace within elements, ignoring
leading/trailing spaces and converting
extra spaces, tabs and newlines into a
single space. When Selenium reads text
out of the page, it attempts to
duplicate t...
How to drop unique in MySQL?
...swered Oct 14 '09 at 8:12
Wael DalloulWael Dalloul
19.4k1111 gold badges4444 silver badges5555 bronze badges
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Display lines number in Stack Trace for .NET assembly in Release mode
...bugging is somewhat limited (stackoverflow.com/questions/113866). However callstacks are quite reliable even in optimized code, with exception of inlined functions and ocasional situations where tail call can be missing because call xxx / ret sequence was replaced with jmp xxx.
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