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Abusing the algebra of algebraic data types - why does this work?
...so enjoy this paper from the same author which builds on the idea further, including notions of division and other interesting whatnot.
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Xml configuration versus Annotation based configuration [closed]
... is going to be injected as a SubtypeY instead of a SubtypeX should not be included in the class, because if now you wish to inject SubtypeX, you have to change your code, whereas you had an interface contract before anyways, so with XML, you would just need to change the XML mappings and it is fair...
How do servlets work? Instantiation, sessions, shared variables and multithreading
...once and keeps it in the server's memory. The web app's web.xml and all of included web-fragment.xml files is parsed, and each <servlet>, <filter> and <listener> found (or each class annotated with @WebServlet, @WebFilter and @WebListener respectively) is instantiated once and kept...
What is “callback hell” and how and why does RX solve it?
... computation in the programming language. The implementations can vary and include: async, generators, coroutines, and callcc.
In Python we can implement that previous loop example with something along the lines of:
def myLoop():
for i in range(10):
doSomething(i)
yield
myGen...
how to implement a pop up dialog box in iOS
...equivalent to a Toast in iOS. Various workarounds that have been presented include:
Make your own with a subclassed UIView
Import a third party project that mimics a Toast
Use a buttonless Alert with a timer
However, my advice is to stick with the standard UI options that already come with iOS. Do...
Python threading.timer - repeat function every 'n' seconds
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Really elegant solution! Odd that they didn't just include a class that does this.
– Roger Dahl
Sep 15 '19 at 18:15
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Getting a list of values from a list of dicts
...quite as simple at first glance, because find returns match objects, which include all kinds of things besides just the matched value, such as a path directly to each item. But for more complex expressions, being able to specify a path like '*.[*].value' instead of a comprehension clause for each * ...
What is SQL injection? [duplicate]
...ord for every account. Now the attacker can log in to anyone's account -- including privileged users.
Where exactly is the point where SQL is injected?
It isn't SQL that's injected, it's content that's interpolated ("injected") into a SQL string, resulting in a different kind of query than I inte...
How do I run a terminal inside of Vim?
...that function lives, or get any idea of what the error means. The message includes a statement about an invalid argument "edit ++enc=utf-8 bash\ -\ 2". Argh.
– Nate Kennedy
Jul 20 '12 at 4:55
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Python - Get path of root project structure
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To include the definitions.py file like that, will it be required to add a __init__.py file to the root project directory as well ? Should that be correct ? I've just started with python and not sure on the best practices. Thank...