ReactJS transfer data between functional and component class

I have a functional component like this:

const myFunction = () => {
   let array = [];
   .....
   return array; // The function return an array
}
...

return (
  <MyComponent data={myFunction()} />
)

I would like to transfer an array to “MyComponent” but the “props.data” value always return an empty array:

class MyComponent extends React.Component  {
      constructor(props) {
         super(props);
         console.log(props.data);
     }
}

Do you know how can I send data to my component class ?