Question: When I add this line off code, instead of showing the image, my page gets blank. How can I fix this?

```
<img>
   src={"https://media1.s-nbcnews.com/i/newscms/2019_21/2870431/190524-classic-american-cheeseburger-ew-207p_d9270c5c545b30ea094084c7f2342eb4.jpg"}  alt={''}
</img>

```

Answer: 
To be sure that your arrays are zero-initialized, you can add a 1-element initializer list as a second argument to the `a` constructor call:

```cpp
std::vector<std::array<double, 10>> a(10, { 0.0, });

```

This will initialize *each* element (array) using that list, as it will be using constructor version #3 described [here in cppreference](https://en.cppreference.com/w/cpp/container/vector/vector).

The 'value' argument used to initialize each array will use aggregate initialization ([see here](https://en.cppreference.com/w/cpp/container/array)), which will zero-initialize any 'missing' values in the list.
You can do this as it is shown in the demonstrative program below:

```
#include <iostream>
#include <array>
#include <vector>

int main() 
{
    std::vector<std::array<double,10>> v(10, { {} } );

    for ( const auto &a : v )
    {
        for ( const auto &item : a )
        {
            std::cout << item << ' ';
        }
        std::cout << '\n';
    }

    return 0;
}

```

The program output is

```
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 
0 0 0 0 0 0 0 0 0 0 

```