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How to correctly implement custom iterators and const_iterators?
...rs, we derive from the standard iterator categories to let STL algorithms know the type of iterator we've made.
In this example, I define a random access iterator and a reverse random access iterator:
//-------------------------------------------------------------------
// Raw iterator with rando...
Get class name of django model
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Instead of doing Book.__class__.__name__ on class itself, if you do it over a book object, then book_object.__class__.__name__ will give you 'Book' (i.e the name of the model)
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Calling a class function inside of __init__
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If I'm not wrong, both functions are part of your class, you should use it like this:
class MyClass():
def __init__(self, filename):
self.filename = filename
self.stat1 = None
self.stat2 = None
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How to handle invalid SSL certificates with Apache HttpClient? [duplicate]
I know, there are many different questions and so many answers about this problem... But I can't understand...
18 Answers
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Best way to require all files from a directory in ruby?
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There's a subtle gotcha to not stripping the extension. If some other part of the code calls require 'foo' then ruby will load the same file again, which can lead to spurious errors. I added my own answer which explains that and shows how to strip the extension.
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How do I use PHP namespaces with autoload?
...Person;
$class = new MyPerson\Class1();
Edit (2009-12-14):
Just to clarify, my usage of "use ... as" was to simplify the example.
The alternative was the following:
$class = new Person\Barnes\David\Class1();
or
use Person\Barnes\David\Class1;
// ...
$class = new Class1();
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How to create the most compact mapping n → isprime(n) up to a limit N?
...the primality test.
There isn't really a data structure for you to query. If you have lots of numbers to test, you should probably run a probabilistic test since those are faster, and then follow it up with a deterministic test to make sure the number is prime.
You should know that the math behind...
What does “:=” do?
...mpanying explanation. It's not exactly possible to google its use without knowing the proper name for it.
10 Answers
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How can you encode a string to Base64 in JavaScript?
...) accepts a “string” where each character represents an 8-bit byte – if you pass a string containing characters that can’t be represented in 8 bits, it will probably break. This isn’t a problem if you’re actually treating the string as a byte array, but if you’re trying to do something...
Python argparse: Make at least one argument required
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if not (args.process or args.upload):
parser.error('No action requested, add -process or -upload')
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