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Java generics type erasure: when and what happens?
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@Richard Indeed, excellent article! You could add that local classes work too and that, in both cases (anonymous and local classes), information about the desired type argument is kept only in case of direct access new Box<String>() {};...
Image Processing: Algorithm Improvement for 'Coca-Cola Can' Recognition
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I agree with @stacker - SIFT is an excellent choice. It's very robust against scale and rotation operations. It 's somewhat robust against perspective deformation (this can be improved as suggested by stacker: a template database with different perspective vi...
What is the purpose of AsQueryable()?
...ts And Linq To SQL. In particular, the article states,
This offers an excellent benefits in real word scenarios where you have certain methods on an entity that return an IQueryable of T and some methods return List. But then you have business rule filter that needs to be applied on all the col...
Does MySQL ignore null values on unique constraints?
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excellent comment about how it's true in mysql, but not necessarily in general.
– user2910265
Sep 13 '14 at 1:52
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Do try/catch blocks hurt performance when exceptions are not thrown?
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That's an excellent point - compare to the other items on our list, this one should be minuscule. We should trust basic language features to behave correctly, and optimize what we can control (sql, indexes, algorithms).
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Find a value anywhere in a database
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ApexSQL Search is an excellent tool. I think this should be the top answer since a tool is an abstract concept that does not involve messing with dirty scripts.
– usefulBee
Feb 1 '16 at 19:50
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What is the meaning of single and double underscore before an object name?
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Excellent answers so far but some tidbits are missing. A single leading underscore isn't exactly just a convention: if you use from foobar import *, and module foobar does not define an __all__ list, the names imported from t...
Why does the use of 'new' cause memory leaks?
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@R.MartinhoFernandes: excellent answer. Just One question. Why you used return by reference in the operator* () function?
– Destructor
Sep 14 '15 at 4:47
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How does password salt help against a rainbow table attack?
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I was searching for a good method to apply salts and found this excelent article with sample code:
http://crackstation.net/hashing-security.htm
The author recomends using random salts per user, so that gaining access to a salt won't render the entire list of hashes as easy to crack.
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Find location of a removable SD card
...ned by getExternalFilesDirs() and getExternalCacheDirs(). See Dave Smith's excellent analysis of this, particularly if you want the low-level details.
Second, lest anyone quibble on whether or not removable media access is otherwise part of the Android SDK, here is Dianne Hackborn's assessment:
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