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java get file size efficiently
...ecessarily the same amount of bytes as file length. To get the real length from a stream, you really need to read it (and count the read bytes meanwhile).
– BalusC
Nov 26 '09 at 13:51
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Which Visual C++ file types should be committed to version control?
...His is very useful. My project also has a .vcb (this project was converted from an older version (eVC) so may be related to that.
– Robbie Matthews
Jan 20 '16 at 1:22
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What is the ultimate postal code and zip regex?
...s, some can contain spaces, others dots, the number of characters can vary from two to at least six...
What you could do (theoretically) is create a seperate regex for every country in the world, not recommendable IMO. But you would still be missing on the validation part: Zip code 12345 may exist,...
Different bash prompt for different vi editing mode?
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Fresh bash 4.3 and readline 6.3 have something for you guys.. from the changelog:
4. New Features in Readline
j. New user-settable variable, show-mode-in-prompt, adds a characters to the
beginning of the prompt indicating the current editing mode.
So putting
set show-mode-in-p...
Multiple linear regression in Python
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sklearn.linear_model.LinearRegression will do it:
from sklearn import linear_model
clf = linear_model.LinearRegression()
clf.fit([[getattr(t, 'x%d' % i) for i in range(1, 8)] for t in texts],
[t.y for t in texts])
Then clf.coef_ will have the regression coefficient...
What is a “static” function in C?
...nit, below the first declaration of that name. The function may be called from other units (and earlier parts of the same unit) via other means, e.g. a function pointer.
– M.M
Nov 30 '15 at 2:38
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Best Practices: Salting & peppering passwords?
...you do hash_function($salt . hash_function($pepper . $password)).
We know from past experience that "just feeding" one hash result into another hash function can decrease the overall security. The reason is that both hash functions can become a target of attack.
That's why algorithms like PBKDF2 ...
How do I pass a class as a parameter in Java?
...s there any way to pass class as a parameter in Java and fire some methods from that class?
10 Answers
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URL query parameters to dict python
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Use the urllib.parse library:
>>> from urllib import parse
>>> url = "http://www.example.org/default.html?ct=32&op=92&item=98"
>>> parse.urlsplit(url)
SplitResult(scheme='http', netloc='www.example.org', path='/default.html', query='...
What's “wrong” with C++ wchar_t and wstrings? What are some alternatives to wide characters?
...s does not require that wchar_t be large enough to represent any character from all locales simultaneously. That is, the encoding used for wchar_t may differ between locales. Which means that you cannot necessarily convert a string to wchar_t using one locale and then convert back to char using anot...