How can I use Iterator methods of strings in my C++ software apps? What kind of iterator methods I can use with a std::string? How can I use begin(), end() iterator methods with strings? the at() method of strings? Can I use front() and back() methods in std::string to access characters?
Modern C++ usesStrings, Wide Strings, andUnicode Stringsto support worldwide…
How can I access a character of awstring? How can I use theat()method of wide strings in modern C++ software? Can I usefront()andback()methods instd::wstringto access characters?
Modern C++ usesWide…
In this post, you’ll get answers to these questions:
What are the Vectors in C++?How can we use std::vector?How can I define vectors for different data types?Can I define structs or other datatypes in std::vector?
By learning how to define vectors in modern C++ on…
In this post, you’ll get answers to these questions:
What are the Vectors in C++?How can I use the front() iterator method on vectors?How can I use the back() iterator method on vectors?Can I get the last member of a vector by using the back() method?How can I access the first element of a vector?Can I print out the first and the last members of vectors by using the front() and back()…
The iterator library that is part of the C++ Standard Library provides the following helpers for writing generic code:
#include <iterator> // helpers are defined here
template<class Container>
void foo(Container& c)
{
// Generic way to obtain (constant)…
Since C++11 there are elegant way to access each element of a containers (or, more generally, sequences) – so called range-for-statement. The syntaxes are follow:
template<class Container>
void foo(Container& container)
{
for (auto element : container)…
Let’s slightly modify the example from The Move Iterator Adapter in C++ post:
#include <algorithm>
#include <list>
#include <string>
#include <vector>
/// @warning BUG! PLEASE, DON'T USE!
auto deep_copy_to_list(const std::vector<std::string>& src)
{
std::list<std::string> dst; // constructs the empty list
copy(cbegin(src), cend(src)…
The dereference prefix operator * being applied to iterator returns the lvalue reference to the element pointed by the iterator. Therefore, algorithms such as std::copy or std::transform calls copying constructors of processed elements, for example:
#include…
By using bidirectional iterator or random access iterator (see Iterator Categories in C++) it’s possible to traverse the sequence in backward direction by using operator -- or by using the special adapter template class std::reverse_iterator. But why to bother with…
Conceptually, iterators are consists of five categories:
input iterator is intended to traverse sequences in the forward direction and provides the read access to the pointed sequence element;output iterator is intended to traverse sequences in the forward direction and provides the write access to the pointed sequence element;forward iterator is intended to traverse sequences in the forward…
