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General suggestions for debugging in R
I get an error when using an R function that I wrote:
13 Answers
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Filtering collections in C#
I am looking for a very fast way to filter down a collection in C#. I am currently using generic List collections, but am open to using other structures if they perform better.
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Array.Copy vs Buffer.BlockCopy
Array.Copy and Buffer.BlockCopy both do the same thing, but BlockCopy is aimed at fast byte-level primitive array copying, whereas Copy is the general-purpose implementation. My question is - under what circumstances should you use BlockCopy ? Should you use it at any time when you are copyi...
How to hide the “back” button in UINavigationController?
Do you know how to hide the 'back' button in a UINavigationController?
Also, how to show it back, but I guess that's very similar to hiding it...
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Difference between Inheritance and Composition
Are Composition and Inheritance the same?
If I want to implement the composition pattern, how can I do that in Java?
17 Ans...
nvm keeps “forgetting” node in new terminal session
...r example:
$ nvm alias default 0.12.7
This sets the default node version in your shell. Then verify that the change persists by closing the shell window, opening a new one, then:
node --version
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How comment a JSP expression?
... comments look like this:
<%-- Comment --%>
So if you want to retain the "=".you could do something like:
<%--= map.size() --%>
The key thing is that <%= defines the beginning of an expression, in which you can't leave the body empty, but you could do something like this instead...
How to check whether a string contains a substring in JavaScript?
Usually I would expect a String.contains() method, but there doesn't seem to be one.
3 Answers
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How to convert .crt to .pem [duplicate]
...can do this conversion with the OpenSSL library
http://www.openssl.org/
Windows binaries can be found here:
http://www.slproweb.com/products/Win32OpenSSL.html
Once you have the library installed, the command you need to issue is:
openssl x509 -in mycert.crt -out mycert.pem -outform PEM
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How do we determine the number of days for a given month in python [duplicate]
I need to calculate the number of days for a given month in python. If a user inputs Feb 2011 the program should be able to tell me that Feb 2011 has 28 days. Could any one tell me which library I should use to determine the length of a given month.
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