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Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
... @Nubok: Sure, they could have added an encoding of movzx / movsx that takes an immediate argument. Most of the time it's more convenient to have the upper bits zeroed, so you can use a value as an array index (because all regs have to be the same size in an effective address: [rsi + e...
How do you use bcrypt for hashing passwords in PHP?
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community wiki
24 revs, 13 users 77%Andrew Moore
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Why should I use core.autocrlf=true in Git?
... line-endings or electing not to normalize the line-endings works fine (as VS still displays it correctly the offending lines will have been deleted once the conflict has been resolved).
– Rich
Jan 16 '12 at 16:50
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How can I get a count of the total number of digits in a number?
... platforms, on a 64-bit Intel Processor machine, with Windows 10, and with VS2017 v.15.9.17. The following 4 cases have the same effect on performance results:
.NET Framework (x86)
Platform = x86
Platform = AnyCPU, Prefer 32-bit is checked in project settings
.NET Framework (x64)
Platform = x...
Best practices for circular shift (rotate) operations in C++
...h>, while gcc require <x86intrin.h>. An #ifdef takes care of gcc vs. icc, but clang doesn't seem to provide them anywhere, except in MSVC compatibility mode with -fms-extensions -fms-compatibility -fms-compatibility-version=17.00. And the asm it emits for them sucks (extra masking and a C...
Big-O for Eight Year Olds? [duplicate]
...0 | 10000
So take quicksort which is O(n log(n)) vs bubble sort which is O(n^2). When sorting 10 things, quicksort is 3 times faster than bubble sort. But when sorting 100 things, it's 14 times faster! Clearly picking the fastest algorithm is important then. When you ge...
Java 8: Where is TriFunction (and kin) in java.util.function? Or what is the alternative?
...ases also exist. See: https://msdn.microsoft.com/en-us/library/bb534960(v=vs.110).aspx
I wonder what the reason was why the language designers opted for Function,
Bifunction and did not continue until DecaExiFunction?
The answer to the second part is type erasure. After compilation there is n...
What is std::promise?
... and in most cases I will expect runtimes that use thread pools. Currently VS2012 does use a thread pool under the hood, and it does not violate the as-if rule. Note that there are very little guarantees that need to be fulfilled for this particular as-if.
– David Rodríguez - ...
What are differences between AssemblyVersion, AssemblyFileVersion and AssemblyInformationalVersion?
... The warning on the AssemblyInformationalVersion format still exists in VS2010 today (May 21, 2013) and your link is dead.
– reinierpost
May 21 '13 at 13:10
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Why do people use Heroku when AWS is present? What distinguishes Heroku from AWS? [closed]
...don't know.
Scaling
I touched on how one might implement this in my IaaS vs PaaS comparison above. Approximately, your application has a Procfile, which has lines of the form dyno_type: command_to_run, so for example (cribbed from http://devcenter.heroku.com/articles/process-model):
web: bundl...