std::array<T,N>::fill

 

C++

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operator==operator!=operator<operator>operator<=operator>=operator<=> (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20)

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Deduction guides(C++17)

 

void fill( const T& value );		(since C++11) (until C++20)
constexpr void fill( const T& value );		(since C++20)

Assigns the value to all elements in the container.

Parameters

value

-

the value to assign to the elements

Return value

(none)

Complexity

Linear in the size of the container.

Example

Run this code

#include <array>
#include <cstddef>
#include <iostream>
 
int main()
{
    constexpr std::size_t xy = 4;
 
    using Cell = std::array<unsigned char, 8>;
 
    std::array<Cell, xy * xy> board;
 
    board.fill({ {0xE2, 0x96, 0x84, 0xE2, 0x96, 0x80, 0, 0} }); // "▄▀";
 
    for (std::size_t count{}; Cell c : board)
    {
        std::cout << c.data() << ((++count % xy) ? "" : "\n");
    }
}

Possible output:

▄▀▄▀▄▀▄▀
▄▀▄▀▄▀▄▀
▄▀▄▀▄▀▄▀
▄▀▄▀▄▀▄▀

See also

fill	copy-assigns the given value to every element in a range (function template)
fill_n	copy-assigns the given value to N elements in a range (function template)
ranges::fill (C++20)	assigns a range of elements a certain value (niebloid)