std::deque::resize
From cppreference.com
| void resize( size_type count, T value = T() ); |
(until C++11) | |
| void resize( size_type count ); |
(1) | (since C++11) |
| void resize( size_type count, const value_type& value ); |
(2) | (since C++11) |
Resizes the container to contain count elements.
If the current size is greater than count, the container is reduced to its first count elements.
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If the current size is less than |
(until C++11) |
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If the current size is less than 1) additional default-inserted elements are appended
2) additional copies of value are appended
|
(since C++11) |
Contents |
[edit] Parameters
| count | - | new size of the container |
| value | - | the value to initialize the new elements with |
| Type requirements | ||
-T must meet the requirements of MoveInsertable and DefaultInsertable in order to use overload (1).
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-T must meet the requirements of CopyInsertable in order to use overload (2).
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[edit] Return value
(none)
[edit] Complexity
Linear in the difference between the current size and count.
[edit] Example
Run this code
#include <iostream> #include <deque> int main() { std::deque<int> c = {1, 2, 3}; std::cout << "The deque holds: "; for(auto& el: c) std::cout << el << ' '; std::cout << '\n'; c.resize(5); std::cout << "After resize up 5: "; for(auto& el: c) std::cout << el << ' '; std::cout << '\n'; c.resize(2); std::cout << "After resize down to 2: "; for(auto& el: c) std::cout << el << ' '; std::cout << '\n'; }
Output:
The deque holds: 1 2 3 After resize up 5: 1 2 3 0 0 After resize down to 2: 1 2
[edit] See also
| returns the number of elements (public member function) | |
| inserts elements (public member function) | |
| erases elements (public member function) |