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Why are side-effects modeled as monads in Haskell?
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Suppose a function has side effects. If we take all the effects it produces as the input and output parameters, then the function is pure to the outside world.
So, for an impure function
f' :: Int -> Int
we add the RealWorld to the consideration
f :: Int -> RealWorl...
Difference between an API and SDK
...ring in your house.
an SDK is implementation tooling. It's like a kit that allows** you to build something custom to hook up to the telephone system or electrical wiring.
*Anything can use an API. Some APIs have security provisions to require license keys, authentication, etc. which may prohibit c...
How to Correctly Use Lists in R?
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Just to address the last part of your question, since that really points out the difference between a list and vector in R:
Why do these two expressions not return the same result?
x = list(1, 2, 3, 4); x2 = list(1:4)
A list can contain any other class as each element. So you can ha...
How to “comment-out” (add comment) in a batch/cmd?
...orrect answer. When using syntax highlighting the REM command does not actually highlight the text as "commented out".
– Automatico
May 29 '14 at 8:42
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How to create .pfx file from certificate and private key?
I need .pfx file to install https on website on IIS.
15 Answers
15
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Extract hostname name from string
...pm package psl (Public Suffix List). The "Public Suffix List" is a list of all valid domain suffixes and rules, not just Country Code Top-Level domains, but unicode characters as well that would be considered the root domain (i.e. www.食狮.公司.cn, b.c.kobe.jp, etc.). Read more about it here.
T...
initializer_list and move semantics
Am I allowed to move elements out of a std::initializer_list<T> ?
8 Answers
8
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Div width 100% minus fixed amount of pixels
...R: Yes, that works also, and is easier to use as you don't have to overide all settings of the less specific rule. The answer was written when the support for the > operator was still not good enough to be reliable.
– Guffa
May 22 '13 at 17:14
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Does Django scale? [closed]
...erformance. That would be 432,000 hits per hour. Response times aren't small (our transactions are large) but there's no degradation from our baseline performance as the load increases.
We're using Apache front-ending Django and MySQL. The OS is Red Hat Enterprise Linux (RHEL). 64-bit. We use ...
getApplication() vs. getApplicationContext()
...nt the Application class you registered in the Manifest, you should never call getApplicationContext() and cast it to your application, because it may not be the application instance (which you obviously experienced with the test framework).
Why does getApplicationContext() exist in the first place...