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A monad is just a monoid in the category of endofunctors, what's the problem?
...l formulation of a monoid, × means the cartesian product of sets. You can read more about that here: en.wikipedia.org/wiki/Cartesian_product, but the basic idea is that an element of S × T is a pair (s, t), where s ∈ S and t ∈ T. So the signature of the monoidal product • : S × S -> S in...
Regex Email validation
...w]+\.)+[a-zA-Z]{2,4})|(([0-9]{1,3}\.){3}[0-9]{1,3}))$";
For more info go read about it here: C# – Email Regular Expression
Also, this checks for RFC validity based on email syntax, not for whether the email really exists. The only way to test that an email really exists is to send and email and...
How to install PyQt4 on Windows using pip?
...stall pyqt4 virtualenv windows', I couldn't find anything and found myself reading this post. While I agree it doesn't answer the specific question asked, I figured it was the most logical place to answer the question for the answer for this question since I couldn't find any information and found ...
What's the best way to bundle static resources in a Go program? [closed]
...ant to use a 3rd party library for this, here's a simple code snippet that reads a binary file, and outputs Go source code that declares a variable of type []byte that will be initialized with the exact content of the file:
imgdata, err := ioutil.ReadFile("someimage.png")
if err != nil {
panic(...
How do I query for all dates greater than a certain date in SQL Server?
...query, 2010-4-01 is treated as a mathematical expression, so in essence it read
select *
from dbo.March2010 A
where A.Date >= 2005;
(2010 minus 4 minus 1 is 2005
Converting it to a proper datetime, and using single quotes will fix this issue.)
Technically, the parser might allow you to g...
What's the difference of ContentType and MimeType
... Django documentation is a bit hand-wavy about it. MIME (it's really worth reading at least the Wikipedia entry) has its origin in extending internet mail, and specifically SMTP. From there, the MIME and MIME-inspired extension design has found its way into a lot of other protocols (such as HTTP her...
is it possible to change values of the array when doing foreach in javascript?
...
return "four";
})
alert(arr);
First off, here is where you should be reading about Array.prototype.forEach():
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach
Second, let's talk briefly about value types in JavaScript.
Primitives (undefined, nul...
Java: splitting a comma-separated string but ignoring commas in quotes
...v.sourceforge.net/
CSV API for Java
Can you recommend a Java library for reading (and possibly writing) CSV files?
Java lib or app to convert CSV to XML file?
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How to remove CocoaPods from a project?
...e / Facebook liraries / architecture settings" madness. Might help someone reading. Again thanks.)
– Fattie
Mar 14 '14 at 7:44
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What's the difference between an object initializer and a constructor?
...am2);
myObjectInstance.MyProperty = someUsefulValue;
However, in multi-threaded environments the atomicity of the object initializer may be beneficial, since it prevents the object from being in a not-fully initialized state (see this answer for more details) - it's either null or initialized like...