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Why is Go so slow (compared to Java)?
...or
comparable programs, yet on some
benchmarks it does quite poorly,
including several in test/bench. The
slowest depend on libraries for which
versions of comparable performance are
not available in Go. For instance,
pidigits depends on a multi-precision
math package, and the C vers...
Role-based access control (RBAC) vs. Claims-based access control (CBAC) in ASP.NET MVC
...be 'made' by anyone. For example, Google authentication may produce claims including a user's "email", thus attaching that email to an identity. Google makes the claim, the application chooses whether to understand and accept that claim. The application itself might subsequently attach a claim calle...
How do I automatically update a timestamp in PostgreSQL
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What is the fastest/most efficient way to find the highest set bit (msb) in an integer in C?
...milar cntlz ("count leading zeros") instruction.)
Example code for gcc:
#include <iostream>
int main (int,char**)
{
int n=1;
for (;;++n) {
int msb;
asm("bsrl %1,%0" : "=r"(msb) : "r"(n));
std::cout << n << " : " << msb << std::endl;
}
return 0;
}
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Polymorphism in C++
...rable to fat interfaces failing at runtime
SFINAE
CRTP
optimisations (many including inlining and dead code elimination, loop unrolling, static stack-based arrays vs heap)
__FILE__, __LINE__, string literal concatenation and other unique capabilities of macros (which remain evil ;-))
templates and m...
How to tell Xcode where my info.plist and .pch files are
I renamed my project and it's files and now Xcode is still looking for the old info.plist file. Where do I set the locations of the .plist and .pch files that it needs.
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Rails update_attributes without save?
...an be accessed with the attr_accessible macro. Then all the attributes not included in that won’t be allowed to be mass-assigned.
class User < ActiveRecord::Base
attr_protected :is_admin
end
user = User.new
user.attributes = { :username => 'Phusion', :is_admin => true }
user.username ...
When saving, how can you check if a field has changed?
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How do I get an apk file from an Android device?
...the phone as it comes back with factory reset) almost ANY app WITHOUT root INCLUDING system apps (hint the annoying update app that updates your phone line it or not can be found by grepping for "ccc")
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