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Difference between Python's Generators and Iterators
...ry generator is an iterator, but not vice versa. A generator is built by calling a function that has one or more yield expressions (yield statements, in Python 2.5 and earlier), and is an object that meets the previous paragraph's definition of an iterator.
You may want to use a custom iterator, ra...
Using property() on classmethods
... (using the classmethod() function) for getting and setting what is essentially a static variable. I tried to use the property() function with these, but it results in an error. I was able to reproduce the error with the following in the interpreter:
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How to avoid having class data shared among instances?
...problem you face is that x.list and y.list are the same list, so when you call append on one, it affects the other.
– Matt Moriarity
Nov 5 '09 at 14:04
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How do you pass custom environment variable on Amazon Elastic Beanstalk (AWS EBS)?
...ll deploy to another environment later and are afraid of forgetting to manually set them, or if you are ok with committing the values to source control. I use a mix of both.
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How to import other Python files?
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importlib was added to Python 3 to programmatically import a module.
It is just a wrapper around __import__, see the docs.
import importlib
moduleName = input('Enter module name:')
importlib.import_module(moduleName)
Note: the .py extension should be removed from mod...
Should arrays be used in C++?
...to use traditional C arrays in C++, or should they be avoided, just like malloc ?
11 Answers
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Event Signature in .NET — Using a Strong Typed 'Sender'? [closed]
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What you're proposing does make alot of sense actually, and I just wonder if this is one of those things that's simply the way it is because it was originally designed before generics, or if there's a real reason for this.
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Inheritance and Overriding __init__ in python
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The book is a bit dated with respect to subclass-superclass calling. It's also a little dated with respect to subclassing built-in classes.
It looks like this nowadays:
class FileInfo(dict):
"""store file metadata"""
def __init__(self, filename=None):
super(FileInfo,...
Why does ConcurrentHashMap prevent null keys and values?
...oncurrentHashMap himself (Doug Lea):
The main reason that nulls aren't allowed in ConcurrentMaps
(ConcurrentHashMaps, ConcurrentSkipListMaps) is that ambiguities that
may be just barely tolerable in non-concurrent maps can't be
accommodated. The main one is that if map.get(key) returns nul...
Why should I use IHttpActionResult instead of HttpResponseMessage?
...which your controller should inherit from, and therefore is just a method call. So no new keyword is needed there. You probably aren't inheriting from ApiController or you are inside a static method. ResponseMessageResult is the return type of ResponseMessage().
– AaronLS
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