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What's a correct and good way to implement __hash__()?
...on, this is about as fast as any hash can be. Sure, if the attributes are known to be integers, and there aren't too many of them, I suppose you could potentially run slightly faster with some home-rolled hash, but it likely wouldn't be as well distributed. hash((self.attr_a, self.attr_b, self.attr_...
Are there any O(1/n) algorithms?
...ensible when we take the mathematical definition of the Big O notation:
Now you can easily substitute g(x) for 1/x … it's obvious that the above definition still holds for some f.
For the purpose of estimating asymptotic run-time growth, this is less viable … a meaningful algorithm cannot ge...
How can I configure the font size for the tree item in the package explorer in Eclipse?
...
The "there is now way" clause is no longer applicable/correct for modern versions of eclipse. It must have been a great answer at some point in time, but this site is not a good fit for evolving Q&A for new versions of software. See ot...
Change default global installation directory for node.js modules in Windows?
...is in the npm-folders documentation. I don't want to start my Win notebook now so I cannot verify it, but you should only change prefix to C:\Program Files\nodejs in your config file. If you want to change it globally for all users, edit the C:\Program Files\nodejs\npmrc file, otherwise create/edit ...
How can a Metro app in Windows 8 communicate with a backend desktop app on the same machine?
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I'm porting my existing project to Win8 right now. It consists of windows service and tray application which are talking to each other via NamedPipes WCF. As you may already know Metro doesn't support named pipes. I ended up using TcpBinding for full duplex connection.
...
Apache Kafka vs Apache Storm
...ions on real time data in parallel.
The common flow of these tools (as I know it) goes as follows:
real-time-system --> Kafka --> Storm --> NoSql --> BI(optional)
So you have your real time app handling high volume data, sends it to Kafka queue. Storm pulls the data from kafka and app...
How to merge dictionaries of dictionaries?
...appropriate here.
d3 = d1.copy()
d3.update(d2)
return d3
And now
from functools import reduce
reduce(rec_merge, (d1, d2, d3, d4))
returns
{'a': {1: 'quux', 2: 'bar'}, 'b': {3: 'baz'}}
Application to the original question:
I've had to remove the curly braces around the letters an...
Why does printf not flush after the call unless a newline is in the format string?
...sing fflush:
printf("Buffered, will be flushed");
fflush(stdout); // Will now print everything in the stdout buffer
Edit: From Andy Ross's comment below, you can also disable buffering on stdout by using setbuf:
setbuf(stdout, NULL);
or its secure version setvbuf as explained here
setvbuf(std...
Unit testing with Spring Security
...se it in one of our next projects. So far I love what I've seen, and right now I'm taking a look at the Spring Security module to determine if it's something we can/should use.
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Is there an alternative to bastard injection? (AKA poor man's injection via default constructor)
...nough to advertise that users can override the dependency, as it's a well-known pattern, but I'll grant that overloaded constructors are marginally more 'in your face' :)
– Mark Seemann
Jul 20 '11 at 7:21
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