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What's the meaning of interface{}?
...refer to the article "How to use interfaces in Go" (based on "Russ Cox’s description of interfaces"):
What is an interface?
An interface is two things:
it is a set of methods,
but it is also a type
The interface{} type, the empty interface is the interface that has n...
Is there any way to delete local commits in Mercurial?
...red Feb 26 '10 at 2:02
too much phptoo much php
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Interfaces with static fields in java for sharing 'constants'
...or, see http://scg.unibe.ch/archive/papers/Scha03aTraits.pdf. For a short description of how traits in Scala compare with interfaces in Java, see http://www.codecommit.com/blog/scala/scala-for-java-refugees-part-5. In the context of teaching OO design, simplistic rules like asserting that interfac...
Error - trustAnchors parameter must be non-empty
...
This description is factually incorrect, and only fixes the problem in the same sense as reinstalling Windows might fix an issue. There is no need to remove all Java packages. If you want to go this way, you only need to install t...
Determine if variable is defined in Python [duplicate]
...eleted. I'm looking for something like defined() in Perl or isset() in PHP or defined? in Ruby.
6 Answers
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Rotating a point about another point (2D)
... pivot point to the new coordinates (x' + a, y' + b).
Following the above description:
a 2D clockwise theta degrees rotation of point (x, y) around point (a, b) is:
Using your function prototype: (x, y) -> (p.x, p.y); (a, b) -> (cx, cy); theta -> angle:
POINT rotate_point(float cx, floa...
Check if an array is empty or exists
...iable hoisting. Make sure you use var whenever declaring a variable:
<?php echo "var image_array = ".json_encode($images);?>
// add var ^^^ here
And then make sure you never accidently redeclare that variable later:
else {
...
image_array = []; // no var here
}
...
Can I create more than one repository for github pages?
...you can change the publishing source in the repository settings.
A better description is available in the GitHub Pages documentation, including options for using custom domain names.
(since April 2013, all username.github.com are now username.github.io)
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When would I use XML instead of SQL? [closed]
...used, which is storing all of my data in a (My)SQL database and then using PHP/Python/etc. to work with it on the web as needed.
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What exactly is an Assembly in C# or .NET?
...
http://www.codeguru.com/columns/csharp_learning/article.php/c5845
An assembly is a file that is automatically generated by the compiler upon successful compilation of every .NET application. It can be either a Dynamic Link Library or an executable file. It is generated only once ...