Remove spaces from std::string in C++

Question

What is the preferred way to remove spaces from a string in C++? I could loop through all the characters and build a new string, but is there a better way?

Answer 1

Removes all whitespace characters such as tabs and line breaks (C++11):

string str = " \n AB cd \t efg\v\n";
str = regex_replace(str,regex("\\s"),"");