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What is the difference between native code, machine code and assembly code?
...ase configuration with JIT optimization enabled:
static void Main(string[] args) {
Console.WriteLine("Hello world");
00000000 55 push ebp ; save stack frame pointer
00000001 8B EC mov ebp,esp ...
What is polymorphism, what is it for, and how is it used?
...reach (Vehicle v in vehicles)
{
Console.WriteLine(
string.Format("A {0} has {1} wheels.",
v.GetType().Name, v.Wheels));
}
}
In this example, we create a list of the base class Vehicle, which does not know about how many wheels each of its sub-classes has...
How does Access-Control-Allow-Origin header work?
...that'll work, that'll let everybody in. Or if the server always sends the string from the Origin: header... but... for security, if you're afraid of hackers, your server should only allow origins on a shortlist, that are allowed to make those requests.
Then, MyCode.js comes from siteA. When it ma...
Difference between timestamps with/without time zone in PostgreSQL
...m You complicate matters with the ::timestamptz. With that you convert the string to TIMESTAMP WITH TIME ZONE, and when that will be further converted to WITHOUT TIME ZONE, that will store the "wall calendar" day and wall clock time of that instant as seen from your session time zone (which is maybe...
Hosting a Maven repository on github
...rror creating commit: Invalid request. For 'properties/name', nil is not a string.'), make sure you state a name in your profile on github.
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Writing your own STL Container
...
Code is runnable out of the box.
#include <iostream>
#include <string>
#include <vector>
template<typename T>
struct It
{
std::vector<T>& vec_;
int pointer_;
It(std::vector<T>& vec) : vec_{vec}, pointer_{0} {}
It(std::vector<T>&...
Multi-key dictionary in c#? [duplicate]
... : ValueObject<MyValueObject> {
public DayOfWeek day;
public string NamedPart;
//properties work fine too
}
...which hopefully makes it easier to have human-readable names for data with value semantics, at least until some future version of C# implements proper tuples with named ...
How do I get current date/time on the Windows command line in a suitable format for usage in a file/
...ort System;
import System.IO;
var dt=DateTime.Now;
Console.WriteLine(dt.ToString("yyyy-MM-dd hh:mm:ss"));
Logman This cannot get the year and day of the week. It's comparatively slow and also creates a temporary file and is based on the time stamps that logman puts on its log files. It will work o...
OO Design in Rails: Where to put stuff
...ails boostrap.
/config/initializer/config.rb
/config/initializer/core_ext/string.rb
/config/initializer/core_ext/array.rb
For reusable code fragments, I often create (micro)plugins so that I can reuse them in other projects.
Helper files usually holds helper methods and sometimes classes when th...
What exactly is a reentrant function?
... (because of performance issues), and thus, if a user want to share a std::string between two threads, the user must protect its access with concurrency primitives;
7.5. Make sure your thread-safe code is recursive-safe
This means using recursive mutexes if you believe the same resource can be use...