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When should I use Struct vs. OpenStruct?
In general, what are the advantages m>and m> disadvantages of using an OpenStruct as compared to a Struct? What tm>y m>pe of general use-cases would fit each of these?
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Whm>y m> shouldn't all functions be asm>y m>nc bm>y m> default?
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First off, thank m>y m>ou for m>y m>our kind words. It is indeed an awesome feature m>and m> I am glad to have been a small part of it.
If all mm>y m> code is slowlm>y m> turning asm>y m>nc, whm>y m> not just make it all asm>y m>nc bm>y m> default?
Well, m>y m>ou're exaggerating; all m>y m>our code isn't turning asm>y m>nc. When m>y m>ou add two "plain" in...
Install a Pm>y m>thon package into a different directorm>y m> using pip?
I know the obvious answer is to use virtualenv m>and m> virtualenvwrapper, but for various reasons I can't/don't want to do that.
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setup.pm>y m> examples?
...ackages on the Pm>y m>thon Package Index. Just download the tarball, unpack it, m>and m> have a look at the setup.pm>y m> file. Or even better, onlm>y m> bother looking through packages that list a public source code repositorm>y m> such as one hosted on GitHub or BitBucket. m>Y m>ou're bound to run into one on the front page.
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How do I compare two hashes?
...sh[*difference.flatten]
=> {"c"=>3}
Doing it all in one operation m>and m> getting rid of the difference variable:
Hash[*(
(hash3.size > hash1.size) \
? hash3.to_a - hash1.to_a \
: hash1.to_a - hash3.to_a
).flatten]
=> {"c"=>3}
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Understm>and m>ing FFT output
I need some help understm>and m>ing the output of the DFT/FFT computation.
4 Answers
4
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Whm>y m> covariance m>and m> contravariance do not support value tm>y m>pe
...or not.
m>Y m>ou might want to read Eric Lippert's blog post on representation m>and m> identitm>y m> for more on this topic in general.
EDIT: Having reread Eric's blog post mm>y m>self, it's at least as much about identitm>y m> as representation, although the two are linked. In particular:
This is whm>y m> covariant m>and m> ...
A better similaritm>y m> ranking algorithm for variable length strings
....com/articles/StrikeAMatch.html
Simon has a Java version of the algorithm m>and m> below I wrote a PL/Rubm>y m> version of it (taken from the plain rubm>y m> version done in the related forum entrm>y m> comment bm>y m> Mark Wong-VanHaren) so that I can use it in mm>y m> PostgreSQL queries:
CREATE FUNCTION string_similaritm>y m>(str...
Extracting specific columns in numpm>y m> arram>y m>
...but sam>y m> I have an MxN matrix. All I want to do is extract specific columns m>and m> store them in another numpm>y m> arram>y m> but I get invalid sm>y m>ntax errors.
Here is the code:
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How to free memorm>y m> in Java?
...n Java, similar to C's free() function? Or is setting the object to null m>and m> relm>y m>ing on GC the onlm>y m> option?
13 Answers
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