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Fastest way to determine if an integer's square root is an integer
I'm looking for the fastest way to determine if a long value is a perfect square (i.e. its square root is another integer):
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What kinds of patterns could I enforce on the code to make it easier to translate to another program
I am setting out to do a side project that has the goal of translating code from one programming language to another. The languages I am starting with are PHP and Python (Python to PHP should be easier to start with), but ideally I would be able to add other languages with (relative) ease. The plan ...
Why does NULL = NULL evaluate to false in SQL server
...ther of them. So, null=null evaluates to not true (false or null, depending on your system), because you don't know the values to say that they ARE equal. This behavior is defined in the ANSI SQL-92 standard.
EDIT:
This depends on your ansi_nulls setting. if you have ANSI_NULLS off, this WILL ev...
Why doesn't Java offer operator overloading?
Coming from C++ to Java, the obvious unanswered question is why didn't Java include operator overloading?
16 Answers
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How do I clone a subdirectory only of a Git repository?
I have my Git repository which, at the root, has two sub directories:
18 Answers
18
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正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...一篇正则表达式教程，部分翻译自codeproject的The 30 Minute Regex Tutorial。由于评论里有过长的URL,所以本页排版比较...
来园子之前写的一篇正则表达式教程，部分翻译自codeproject的The 30 Minute Regex Tutorial。
由于评论里有过...
Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
Compiling this:
5 Answers
5
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What should main() return in C and C++?
...and C++ — int main() or void main() — and why? And how about the arguments?
If int main() then return 1 or return 0 ?
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How can I link to a specific glibc version?
When I compile something on my Ubuntu Lucid 10.04 PC it gets linked against glibc. Lucid uses 2.11 of glibc. When I run this binary on another PC with an older glibc, the command fails saying there's no glibc 2.11...
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Pretty-print C++ STL containers
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This solution was inspired by Marcelo's solution, with a few changes:
#include <iostream>
#include <iterator>
#include <type_traits>
#include <vector>
#include <algorithm>
// This works similar to ostream_iterator, but doesn't print a delimiter after the fin...