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Static variables in JavaScript
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If you come from a class-based, statically typed object-oriented language (like Java, C++ or C#) I assume that you are trying to create a variable or method associated to a "type" but not to an instance.
An example using a "classical" approach, with constructor functions maybe coul...
In what situations would AJAX long/short polling be preferred over HTML5 WebSockets?
I am building a small chat application for friends, but unsure about how to get information in a timely manner that is not as manual or as rudimentary as forcing a page refresh.
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What is the JavaScript convention for no operation?
...said, you can easily define your own noop function and, infact, many libraries and frameworks also provide noop functions. Below are some examples:
var noop = function () {}; // Define your own noop in ES3 or ES5
const noop = () => {}; // Define in ES6 as Lambda (arrow fu...
Efficiently updating database using SQLAlchemy ORM
...ommit you don't have any stale data issues.
In the almost-released 0.5 series you could also use this method for updating:
session.query(Stuff).update({Stuff.foo: Stuff.foo + 1})
session.commit()
That will basically run the same SQL statement as the previous snippet, but also select the changed ...
Why is creating a new process more expensive on Windows than Linux?
...of overhead to process creation. For one, it requires the CSRSS to be notified about process creation, which involves LPC. It requires at least kernel32 to be loaded additionally, and it has to perform a number of additional bookkeeping work items to be done before the process is considered to be a ...
Why does running the Flask dev server run itself twice?
...hat process each time your code changes. Werkzeug is the library that supplies Flask with the development server when you call app.run().
See the restart_with_reloader() function code; your script is run again with subprocess.call().
If you set use_reloader to False you'll see the behaviour go awa...
Using an ORM or plain SQL? [closed]
... Usually it was either the documentation or complexity (from my point of view) holding me back.
13 Answers
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Circle-Rectangle collision detection (intersection)
...en the circle intersects with the rectangle:
Either the circle's centre lies inside the rectangle, or
One of the edges of the rectangle has a point in the circle.
Note that this does not require the rectangle to be axis-parallel.
(One way to see this: if none of the edges has a point in the ...
How does mockito when() invocation work?
...ed from JMock, ClassImposterizer that handles creating the mock. The key pieces of the 'mockito magic' used are the MethodInterceptor used to create the mock: the mockito MethodInterceptorFilter, and a chain of MockHandler instances, including an instance of MockHandlerImpl. The method interceptor...
SAML: Why is the certificate within the Signature?
...is from someone that you trust, so you can authorise the user details supplied in the SAML attributes supplied.
You could already have the public key, meaning that the signature shouldn't need to include the public key again, but you could also have multiple possible known senders, or even a chain ...