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How does one write code that best utilizes the CPU cache to improve performance?
...
The cache is there to reduce the number of times the CPU would stall waiting for a memory request to be fulfilled (avoiding the memory latency), and as a second effect, possibly to reduce the overall amount of data that needs to be transfered (preserving memory bandwidth).
Techniques for avoidi...
How well is Unicode supported in C++11?
...ibrary support unicode?
Terribly.
A quick scan through the library facilities that might provide Unicode support gives me this list:
Strings library
Localization library
Input/output library
Regular expressions library
I think all but the first one provide terrible support. I'll get back to i...
Web Service vs WCF Service
...cations that can communicate using a variety of communication mechanisms. With it, you can communicate using Peer to Peer, Named Pipes, Web Services and so on.
You can’t compare them because WCF is a framework for building interoperable applications. If you like, you can think of it as a SOA enab...
What is attr_accessor in Ruby?
... two different methods. The former is called reader and latter is called writer. We didn't create the writer yet so let's do that.
class Person
def name
@name
end
def name=(str)
@name = str
end
end
person = Person.new
person.name = 'Dennis'
person.name # => "Dennis"
Awesome. ...
Why is reading lines from stdin much slower in C++ than Python?
...sing Python and C++ and was shocked to see my C++ code run an order of magnitude slower than the equivalent Python code. Since my C++ is rusty and I'm not yet an expert Pythonista, please tell me if I'm doing something wrong or if I'm misunderstanding something.
...
How to analyze a java thread dump?
...ead id and NID is: Native thread ID. This ID is highly platform dependent. It's the NID in jstack thread dumps. On Windows, it's simply the OS-level thread ID within a process. On Linux and Solaris, it's the PID of the thread (which in turn is a light-weight process). On Mac OS X, it is said to b...
Disable output buffering
... environment variable
PYTHONUNBUFFERED.
You could also replace sys.stdout with
some other stream like wrapper which
does a flush after every call.
class Unbuffered(object):
def __init__(self, stream):
self.stream = stream
def write(self, data):
self.stream.write(data)
self...
Django: Get an object form the DB, or 'None' if nothing matches
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In Django 1.6 you can use the first() Queryset method. It returns the first object matched by the queryset, or None if there is no matching object.
Usage:
p = Article.objects.order_by('title', 'pub_date').first()
...
Response.Redirect with POST instead of Get?
...a form submission and save some data, then redirect the user to a page offsite, but in redirecting, we need to "submit" a form with POST, not GET.
...
How do I use reflection to invoke a private method?
...s BindingFlags:
MethodInfo dynMethod = this.GetType().GetMethod("Draw_" + itemType,
BindingFlags.NonPublic | BindingFlags.Instance);
dynMethod.Invoke(this, new object[] { methodParams });
Here's the BindingFlags enumeration documentation.
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