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What is the purpose of XORing a register with itself? [duplicate]
...x will always set eax to zero, right? So, why does MSVC++ sometimes put it in my executable's code? Is it more efficient that mov eax, 0 ?
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What is the motivation for bringing Symbols to ES6?
As you may know they are planning to include new Symbol primitive type in ECMAScript 6 (not to mention some other crazy stuff). I always thought that the :symbol notion in Ruby is needless; we could easily use plain strings instead, like we do in JavaScript. And now they decide to complicate thi...
Can you add new statements to Python's syntax?
Can you add new statements (like print , raise , with ) to Python's syntax?
13 Answers
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Regular Expressions: Is there an AND operator?
...follow
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edited Jan 22 '09 at 20:57
answered Jan 22 '09 at 16:58
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What is LDAP used for?
I know that LDAP is used to provide some information and to help facilitate authorization.
16 Answers
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Handler “ExtensionlessUrlHandler-Integrated-4.0” has a bad module “ManagedPipelineHandler” in its mo
...a dirty trick on IIS and just when I thought that I was going to get away with it, I realized my workaround doesn't work. Here's what I've tried to do:
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Two versions of python on linux. how to make 2.7 the default
...present, and selected by #! /usr/bin/env python. You can usually get away with running Python 2.6 scripts in 2.7, but do you want to risk it?
On top of that, monkeying with /usr/bin can break your package manager's ability to manage packages. And changing the order of directories in your PATH will ...
Am I immoral for using a variable name that differs from its type only by case?
... the reasoning of those telling you this is bad? I do this all the time. It is the simplest, expressive way to name a single variable of a type. If you needed two Person objects then you could prefix person with meaningful adjectives like
fastPerson
slowPerson
otherwise just
person
is fine ...
Why can a class not be defined as protected?
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Because it makes no sense.
Protected class member (method or variable) is just like package-private (default visibility), except that it also can be accessed from subclasses.
Since there's no such concept as 'subpackage' or 'package...
How can I see the SQL that will be generated by a given ActiveRecord query in Ruby on Rails
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When last I tried to do this there was no official way to do it. I resorted to using the function that find and its friends use to generate their queries directly. It is private API so there is a huge risk that Rails 3 will totally break it, but for debugging, it is an ok solution.
Th...