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How to make my custom type to work with “range-based for loops”?
...ample of why this is useful is that your end iterator can read "check your char* to see if it points to '0'" when == with a char*. This allows a C++ range-for expression to generate optimal code when iterating over a null-terminated char* buffer.
struct null_sentinal_t {
template<class Rhs,
...
Is there a printf converter to print in binary format?
...he %d to %c, because it should be even faster (%d has to perform digit->char conversion, while %c simply outputs the argument
– user719662
May 27 '16 at 15:20
3
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Decimal separator comma (',') with numberDecimal inputType in EditText
...
Even better, use char localizedSeparator = DecimalFormatSymbols.getInstance().getDecimalSeparator(); localizedFloatString = localizedFloatString.replace('.', localizedSeparator);
– southerton
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How do I create a random alpha-numeric string in C++?
I'd like to create a random string, consisting of alpha-numeric characters. I want to be able to be specify the length of the string.
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Read whole ASCII file into C++ std::string [duplicate]
...
std::ifstream t("file.txt");
std::string str((std::istreambuf_iterator<char>(t)),
std::istreambuf_iterator<char>());
Not sure where you're getting the t.open("file.txt", "r") syntax from. As far as I know that's not a method that std::ifstream has. It looks like you'v...
How to easily map c++ enums to strings
...mes themselves as strings, see this post.
Otherwise, a std::map<MyEnum, char const*> will work nicely. (No point in copying your string literals to std::strings in the map)
For extra syntactic sugar, here's how to write a map_init class. The goal is to allow
std::map<MyEnum, const char*&g...
How to read a single char from the console in Java (as the user types it)?
Is there an easy way to read a single char from the console as the user is typing it in Java? Is it possible? I've tried with these methods but they all wait for the user to press enter key:
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LINQPad [extension] methods [closed]
...QueryLanguage.Expression, @"from c in Customers
where c.Name.Length > 3
select c.Name", "Click to run!").Dump();
You can also write your own extension methods in LINQPad. Go to 'My Queries' and click the query called 'My Extensions'. Any types/methods that define here are accessible to all quer...
How to change string into QString?
...QString::fromStdString(str);
If by string you mean Ascii encoded const char * then you can use this method:
QString QString::fromAscii(const char * str, int size = -1)
const char* str = "Hello world";
QString qstr = QString::fromAscii(str);
If you have const char * encoded with system enco...
C语言结构体里的成员数组和指针 - c++1y / stl - 清泛IT社区，为创新赋能！
...#include <stdio.h>
struct str{
int len;
char s[0];
};
struct foo {
struct str *a;
};
int main(int argc, char** argv) {
struct foo f={0};
if (f.a->s) {
printf( f.a->s);
&...