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How can I validate a string to only allow alphanumeric characters in it?
How can I validate a string using Regular Expressions to only allow alphanumeric characters in it?
10 Answers
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hash function for string
I'm working on hash table in C language and I'm testing hash function for string.
9 Answers
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How do I do a case-insensitive string comparison?
How can I do case insensitive string comparison in Python?
9 Answers
9
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Passing variable arguments to another function that accepts a variable argument list
...s is for general debugprinting only so I did this:
//Helper function
std::string osprintf(const char *fmt, ...)
{
va_list args;
char buf[1000];
va_start(args, fmt);
vsnprintf(buf, sizeof(buf), fmt, args );
va_end(args);
return buf;
}
which I then can use like this
Point2d...
C++ : why bool is 8 bits long?
...or booleans, in a way. I seem to remember Pascal implementing sets as bit strings. That is, for the following set:
{1, 2, 5, 7}
You might have this in memory:
01100101
You can, of course, do something similar in C / C++ if you want. (If you're keeping track of a bunch of booleans, it could ...
Java String remove all non numeric characters
...
Try this code:
String str = "a12.334tyz.78x";
str = str.replaceAll("[^\\d.]", "");
Now str will contain "12.334.78".
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JSONDecodeError: Expecting value: line 1 column 1 (char 0)
...or is due to :
non-JSON conforming quoting
XML/HTML output (that is, a string starting with <), or
incompatible character encoding
Ultimately the error tells you that at the very first position the string already doesn't conform to JSON.
As such, if parsing fails despite having a data-bo...
Convert a string representation of a hex dump to a byte array using Java?
I am looking for a way to convert a long string (from a dump), that represents hex values into a byte array.
24 Answers
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How to send a simple string between two programs using pipes?
...********/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
int main(void)
{
int fd[2], nbytes;
pid_t childpid;
char string[] = "Hello, world!\n";
char readbuffer[80];
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Is it possible to print a variable's type in standard C++?
...havior.
What I'm recommending below is:
template <typename T> std::string type_name();
which would be used like this:
const int ci = 0;
std::cout << type_name<decltype(ci)>() << '\n';
and for me outputs:
int const
<disclaimer> I have not tested this on MSVC. &...