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std::string formatting like sprintf
I have to format std::string with sprintf and send it into file stream. How can I do this?
40 Answers
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Finding current executable's path without /proc/self/exe
...es a program is expected to create the same environment (argv, environment strings, etc.) for that program as if it were run from a shell, with some optional extras. A program or user can setup an environment that deviates from this convention for other subordinate programs that it launches but if i...
Variable number of arguments in C++?
...ut yourself. In the case of printf(), for example, the function parses the string argument for special tokens to figure out how many extra arguments it should expect in the variable argument list.
– wilhelmtell
Jun 23 '10 at 21:33
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memcpy() vs memmove()
...
But to sight out one difference:
#include <memory.h>
#include <string.h>
#include <stdio.h>
char str1[7] = "abcdef";
int main()
{
printf( "The string: %s\n", str1 );
memcpy( (str1+6), str1, 10 );
printf( "New string: %s\n", str1 );
strcpy_s( str1, sizeof(str1), "...
How to throw std::exceptions with variable messages?
... {
stream_ << value;
return *this;
}
std::string str() const { return stream_.str(); }
operator std::string () const { return stream_.str(); }
enum ConvertToString
{
to_str
};
std::string operator >> (ConvertToString) { r...
How do I check if a given string is a legal/valid file name under Windows?
...
This does not answer the question; there are many strings consisting only of valid characters (e.g. "....", "CON", strings hundreds of chars long) that are not valid filenames.
– Dour High Arch
Jul 21 '13 at 17:57
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Logstash实践: 分布式系统的日志监控 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...到Email，File，Tcp，或者作为其它程序的输入，又或者安装插件实现和其他系统的对接，比如搜索引擎Elasticsearch。
总结：Logstash概念简单，通过组合可以满足多种需求。
3. Logstash的安装，搭建和配置
3.1. 安装Java
下载JDK压缩包...
How to allocate aligned memory only using the standard library?
...specialized things, like playing with graphics systems, they can need more stringent alignment than the rest of the system — hence questions and answers like this.)
The next step is to convert the void pointer to a char pointer; GCC notwithstanding, you are not supposed to do pointer arithmetic o...
How to TryParse for Enum value?
I want to write a function which can validate a given value (passed as a string) against possible values of an enum . In the case of a match, it should return the enum instance; otherwise, it should return a default value.
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Replace multiple characters in one replace call
...er, then you will just have to chain. However, you could add a prototype:
String.prototype.allReplace = function(obj) {
var retStr = this;
for (var x in obj) {
retStr = retStr.replace(new RegExp(x, 'g'), obj[x]);
}
return retStr;
};
console.log('aabbaabbcc'.allReplace({'a':...