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Declaring variables inside loops, good practice or bad practice?
...; counter <= 10; counter++) {
// compiler can pull this out
const char testing[] = "testing";
cout << testing;
}
or you can pull the constant out:
const std::string testing = "testing";
for (int counter = 0; counter <= 10; counter++) {
cout << testing;
}
Do most...
What is the logic behind the “using” keyword in C++?
...::f; // lift Base's f into Derived's scope -- works in C++98
void f(char); // provide a new f
void f(int); // prefer this f to Base::f(int)
using Base::Base; // lift Base constructors Derived's scope -- C++11 only
Derived(char); // provide a new constructor
Der...
Determine a string's encoding in C#
...igh probability) unicode files with the BOM/signature missing
Searches for charset=xyz and encoding=xyz inside file to help determine encoding.
To save processing, you can 'taste' the file (definable number of bytes).
The encoding and decoded text file is returned.
Purely byte-based solution for eff...
What is dynamic programming? [closed]
...er the three natural types of changes:
Substitution - change a single character from pattern "s" to a different character in text "t", such as changing "shot" to "spot".
Insertion - insert a single character into pattern "s" to help it match text "t", such as changing "ago" to "agog".
...
Why should C++ programmers minimize use of 'new'?
...ts. std::string is a perfect example. This snippet:
int main ( int argc, char* argv[] )
{
std::string program(argv[0]);
}
actually allocates a variable amount of memory. The std::string object allocates memory using the heap and releases it in its destructor. In this case, you did not need ...
How do malloc() and free() work?
...n limitations.
Why does your code crash:
The reason is that by writing 9 chars (don't forget the trailing null byte) into an area sized for 4 chars, you will probably overwrite the administrative-data stored for another chunk of memory that resides "behind" your chunk of data (since this data is m...
How to print color in console using System.out.println?
...se the Java IO layer does not convert those to colors. System.out.println((char)27 + "[31;1mERROR" + (char)27 + "[0m" only yields "[31;1mERROR[0m" when run from a windows cmd.com as an executable .jar
– simpleuser
Feb 12 '17 at 6:03
...
I want to get the type of a variable at runtime
... case _: B => "A is a B"
case _ => "A is not a B"
}
f(x, y) // A (Char) is not a B (Int)
f(x, z) // A (Char) is a B (Any)
Here I'm using the context bounds syntax, B : ClassTag, which works just like the implicit parameter in the previous ClassTag example, but uses an anonymous variable.
...
The static keyword and its various uses in C++
... do different things. For instance, you could put a static void log(const char*) {} in each cpp file, and they could each all log in a different way.
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What is the difference between quiet NaN and signaling NaN?
...trtod and 7.22.1.3 "The strtod, strtof, and strtold functions" says:
A character sequence NAN or NAN(n-char-sequence opt ) is interpreted as a quiet
NaN, if supported in the return type, else like a subject sequence part that does not have
the expected form; the meaning of the n-char sequenc...