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Monad in plain English? (For the OOP programmer with no FP background)
...has certain operations provided.
First, what is an "amplifier of types"? By that I mean some system which lets you take a type and turn it into a more special type. For example, in C# consider Nullable<T>. This is an amplifier of types. It lets you take a type, say int, and add a new capabil...
A monad is just a monoid in the category of endofunctors, what's the problem?
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That particular phrasing is by James Iry, from his highly entertaining Brief, Incomplete and Mostly Wrong History of Programming Languages, in which he fictionally attributes it to Philip Wadler.
The original quote is from Saunders Mac Lane in Categorie...
Unable to read data from the transport connection : An existing connection was forcibly closed by th
... or "Unavailable".
Edit - added
It IS possible that this is being caused by a firewall blocking the port, but given that you say it's intermittent ("sometimes when the client tries to connect"), that's very unlikely. I didn't include that originally because I had ruled it out mentally before repl...
A simple explanation of Naive Bayes Classification
... Bayes, and I was wondering if someone could explain it with a simple step by step process in English. I understand it takes comparisons by times occurred as a probability, but I have no idea how the training data is related to the actual dataset.
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How to convert an ArrayList containing Integers to primitive int array?
...is:
getting a Stream<Integer> from the list
obtaining an IntStream by mapping each element to itself (identity function), unboxing the int value hold by each Integer object (done automatically since Java 5)
getting the array of int by calling toArray
You could also explicitly call intValue...
How to colorize diff on the command line?
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Just found that myself :-). It can be piped into less by using less -R, which displays the escape sequences for colors correctly.
– daniel kullmann
Jan 10 '12 at 9:25
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How do BitTorrent magnet links work?
...t find any answers. The wiki says xt means "exact topic" and is followed by the format ( btih in this case) with a SHA1 hash. I saw base32 mentioned, knowing it's 5 bits per character and 32 characters, I found it holds exactly 160bits, which is exactly the size of the SHA1.
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Is there a difference between authentication and authorization?
...e is indeed a fundamental difference. Authentication is the mechanism whereby systems may securely identify their users. Authentication systems seek to provide answers to the questions:
Who is the user?
Is the user really who they claim / represent to be?
Authorization, by contrast, is the mecha...
Unable to load DLL 'SQLite.Interop.dll'
...latest x86/x64 today (version 1.0.88.0). My local IIS in VS2012 runs 32bit by default and there's no easy way to switch to x64. My production server runs 64bit.
Anyway I installed the NuGet package to a DLL project and I got this error. What I had to do to get it working I had to install it to the ...
Dealing with “java.lang.OutOfMemoryError: PermGen space” error
...+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled
You can do that by shutting down the tomcat service, then going into the Tomcat/bin directory and running tomcat6w.exe. Under the "Java" tab, add the arguments to the "Java Options" box. Click "OK" and then restart the service.
If you get a...