Can't read length of array in JSX (React-Redux)

Question

Simple enough question. I am trying to read the value of the "length" variable inside this array of objects (See Image 1)

MY CODE

const mapStateToProps = (state, ownProps) => {

    const lecture = state.firestore.ordered.lectures;
    const length = lecture.length;

    return {

        length: length,

    }
}

Answer 1

WHILE WRITING THIS QUESTION I FOUND THE SOLUTION:

SOLUTION CODE

const mapStateToProps = (state, ownProps) => {


    const length = state.firestore.ordered.lectures && state.firestore.ordered.lectures.length;



    return {

        length: length,

    }
}