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Fastest way to list all primes below N

...t William Hanks for primesfrom2to, primesfrom3to, rwh_primes, rwh_primes1, and rwh_primes2. Of the plain Python methods tested, with psyco, for n=1000000, rwh_primes1 was the fastest tested. +---------------------+-------+ | Method | ms | +---------------------+-------+ | rwh_prime...
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How to recursively find the latest modified file in a directory?

...n BSD, the options for formatting is different (-f "%m %N" it would seem) And I missed the part of plural; if you want more then the latest file, just bump up the tail argument. share | improve thi...
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Uniq by object attribute in Ruby

... This is the correct answer for ruby 1.9 and later versions. – nurettin Dec 15 '12 at 7:06 2 ...
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C++: const reference, before vs after type-specifier

...le, which is redundant; when dealing with const pointers both Fred const* and Fred* const are valid but different. It's a matter of style, but I prefer using const as a suffix since it can be applied consistently including const member functions. ...
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What is the fastest way to get the value of π?

... fastest π I know of is the one with the digits hard coded. Looking at Pi and Pi[PDF], there are a lot of formulae. Here is a method that converges quickly — about 14 digits per iteration. PiFast, the current fastest application, uses this formula with the FFT. I'll just write the formula, since...
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Multiprocessing: How to use Pool.map on a function defined in a class?

...s: I tried using parmap on some functions that passed around a defaultdict and got the PicklingError again. I did not figure out a solution to this, I just reworked my code to not use the defaultdict. – sans Jul 8 '11 at 23:41 ...
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How to Publish Web with msbuild?

Visual Studio 2010 has a Publish command that allows you to publish your Web Application Project to a file system location. I'd like to do this on my TeamCity build server, so I need to do it with the solution runner or msbuild. I tried using the Publish target, but I think that might be for ClickOn...
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Algorithm to generate all possible permutations of a list?

... left to right, all the permutations of the remaining items are generated (and each one is added with the current elements). This can be done recursively (or iteratively if you like pain) until the last item is reached at which point there is only one possible order. So with the list [1,2,3,4] all ...
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Why does this Java program terminate despite that apparently it shouldn't (and didn't)?

...etely wrong. An actuator on an electron microscope went over its boundary, and after a chain of events I lost $12 million of equipment. I've narrowed down over 40K lines in the faulty module to this: ...
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How to get a list of installed android applications and pick one to run

...sked a similar question to this earlier this week but I'm still not understanding how to get a list of all installed applications and then pick one to run. ...