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std::basic_string::erase

From cppreference.com
< cpp‎ | string‎ | basic string
 
 
 
std::basic_string
 
basic_string& erase( size_type index = 0, size_type count = npos );
(1)
(2)
iterator erase( iterator position );
(until C++11)
iterator erase( const_iterator position );
(since C++11)
(3)
iterator erase( iterator first, iterator last );
(until C++11)
iterator erase( const_iterator first, const_iterator last );
(since C++11)

Removes specified characters from the string.

1) Removes min(count, size() - index) characters starting at index.
2) Removes the character at position.
3) Removes the character in the range [first; last).

Contents

[edit] Parameters

index - first character to remove
count - number of characters to remove
position - iterator to the character to remove
first, last - range of the characters to remove

[edit] Return value

1) *this
2-3) iterator following the last removed character.

[edit] Exceptions

1) std::out_of_range if index > size().
2-3) (none)

In any case, if an exception is thrown for any reason, this function has no effect (strong exception guarantee). (since C++11)

[edit] Example

#include <iostream>
#include <algorithm>
#include <string>
int main ()
{
    std::string s = "This is an example";
    std::cout << s << '\n';
 
    s.erase(0, 5); // Erase "This "
    std::cout << s << '\n';
 
    s.erase(std::find(s.begin(), s.end(), ' ')); // Erase ' '
    std::cout << s << '\n';
 
    s.erase(s.find(' ')); // Trim from ' ' to the end of the string
    std::cout << s << '\n';
}

Output:

This is an example
is an example
isan example
isan

[edit] See also

clears the contents
(public member function) [edit]