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Argparse: Required arguments listed under “optional arguments”?
...” (or whatever you want to call them):
parser = argparse.ArgumentParser(description='Foo')
parser.add_argument('-o', '--output', help='Output file name', default='stdout')
requiredNamed = parser.add_argument_group('required named arguments')
requiredNamed.add_argument('-i', '--input', help='Input...
Adaptive segue in storyboard Xcode 6. Is push deprecated?
...older than iOS 8.
The document in the following link explains that and the description of all the available segues, old and new.
Adding a Segue Between Scenes in a Storyboard
In case the URL changes in the future, this is the explanation given for each new segue:
Show
Present the content in the det...
Python function overloading
... was added PEP-0443. Single-dispatch generic functions.
Here is short API description from PEP.
To define a generic function, decorate it with the @singledispatch decorator. Note that the dispatch happens on the type of the first argument. Create your function accordingly:
from functools import s...
Is there more to an interface than having the correct methods
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How did this get selected as the answer? It's a brief description of why polymorphism is useful, but as the poster above said, I would expect a better explanation of multiple interfaces and even more importantly when it is appropriate to use an interface vs an abstract class.
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Executors.newCachedThreadPool() versus Executors.newFixedThreadPool()
...implement a custom Thread factory for the below use cases:
To set a more descriptive thread name
To set thread daemon status
To set thread priority
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Git cherry pick vs rebase
...own tip commits in one way or another. Yes, this is a heavily dumbed down description of what git rebase can do, but it's intentional, to try to make the general idea sink in.
Update to further explain an example of using git rebase being discussed.
Given this situation,The Book states:
Howev...
When & why to use delegates? [duplicate]
... go my head around these, and so I'll share an example as you already have descriptions but at the moment one advantage I see is to get around the Circular Reference style warnings where you can't have 2 projects referencing each other.
Let's assume an application downloads an XML, and then saves t...
Too many 'if' statements?
...oretically" is one thing, "practically" is another. Of course I try to use descriptive naming (with the exception of the i/j/k convention for loop variables), named constants, arranging my code in a readable fashion, etc., but when the variable and function names start taking up more than 20 charact...
Java generics type erasure: when and what happens?
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The term "type erasure" is not really the correct description of Java's problem with generics.
Type erasure is not per se a bad thing, indeed it is very necessary for performance and is often used in several languages like C++, Haskell, D.
Before you disgust, please recall...
Handler vs AsyncTask vs Thread [closed]
...sage and Runnable objects
associated with a thread's MessageQueue
This description might seem strange at first. We only need to understand that each thread has each message queue (like a to-do list), and the thread will take each message and do it until the message queue is empty (just like we f...