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Which, if any, C++ compilers do tail-recursion optimization?
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All current mainstream compilers perform tail call optimisation fairly well (and have done for more than a decade), even for mutually recursive calls such as:
int bar(int, int);
int foo(int n, int acc) {
return (n == 0) ? acc : bar(n - 1, acc...
How to get a complete list of object's methods and attributes?
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For the complete list of attributes, the short answer is: no. The problem is that the attributes are actually defined as the arguments accepted by the getattr built-in function. As the user can reimplement __getattr__, suddenly allow...
Append values to query string
...things like parsing, url encoding, ...:
string longurl = "http://somesite.com/news.php?article=1&lang=en";
var uriBuilder = new UriBuilder(longurl);
var query = HttpUtility.ParseQueryString(uriBuilder.Query);
query["action"] = "login1";
query["attempts"] = "11";
uriBuilder.Query = query.ToStrin...
Default constructor vs. inline field initialization
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Hexadecimal To Decimal in Shell Script
... What ? bc is An arbitrary precision calculator language : an external command.
– Gilles Quenot
Nov 7 '12 at 23:40
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Inheriting from a template class in c++
... class). Another such class would be Area<char>. Note that those are completely different classes, which have nothing in common except for the fact that they were generated from the same class template.
Since Area is not a class, you cannot derive the class Rectangle from it. You only can der...
String literals and escape characters in postgresql
...n as a newline when I used it in the query argument to psql's `\copy' meta-command.
– Stew
Dec 31 '15 at 17:09
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Importing from a relative path in Python
...an absolute import. The '..' means, go to the directory above me:
from ..Common import Common
As a caveat, this will only work if you run your python as a module, from outside of the package. For example:
python -m Proj
Original hacky way
This method is still commonly used in some situat...
Compute a confidence interval from sample data
I have sample data which I would like to compute a confidence interval for, assuming a normal distribution.
4 Answers
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How to properly overload the
...am writing a small matrix library in C++ for matrix operations. However my compiler complains, where before it did not. This code was left on a shelf for 6 months and in between I upgraded my computer from debian etch to lenny (g++ (Debian 4.3.2-1.1) 4.3.2
) however I have the same problem on a Ubun...