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Difference between class and type
...a type. An array is a type.
Therefore, every type is also either a class (including an enum constant), an interface, a primitive, or an array.
There are two distinct categories of types: primitive types and reference types:
A variable of primitive type always holds a primitive value of that same...
Simple regular expression for a decimal with a precision of 2
...n ()? to make it optional. Be aware that this excludes forms such as 12. Including that would be more like ^\d+\\.?\d{0,2}$.
Added
Use ^\d{1,6}(\.\d{1,2})?$ to stop repetition and give a restriction to whole part of the decimal value.
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What is more efficient? Using pow to square or just multiply it with itself?
...ance difference between x*x*... vs pow(x,i) for small i using this code:
#include <cstdlib>
#include <cmath>
#include <boost/date_time/posix_time/posix_time.hpp>
inline boost::posix_time::ptime now()
{
return boost::posix_time::microsec_clock::local_time();
}
#define TEST(nu...
Casting interfaces for deserialization in JSON.NET
...a JSON stream into a concrete class that has interface properties, you can include the concrete classes as parameters to a constructor for the class! The NewtonSoft deserializer is smart enough to figure out that it needs to use those concrete classes to deserialize the properties.
Here is an ex...
When to use static vs instantiated classes
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How to get current moment in ISO 8601 format with date, hour, and minute?
...gives you the date/time in the current timezone - not UTC. Carlos' answer includes the necessary UTC code.
– Scott Rippey
Mar 30 '12 at 16:15
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How to change the CHARACTER SET (and COLLATION) throughout a database?
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jQuery Set Cursor Position in Text Area
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What exactly does the Access-Control-Allow-Credentials header do?
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By default, CORS does not include cookies on cross-origin requests. This is different from other cross-origin techniques such as JSON-P. JSON-P always includes cookies with the request, and this behavior can lead to a class of vulnerabilities called c...
C++ display stack trace on exception
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If you are using Boost 1.65 or higher, you can use boost::stacktrace:
#include <boost/stacktrace.hpp>
// ... somewhere inside the bar(int) function that is called recursively:
std::cout << boost::stacktrace::stacktrace();
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