const powerset = arr =>
  arr.reduce((a, v) => a.concat(a.map(r => r.concat(v))), [[]]);
  
powerset([1, 2]); // [[], [1], [2], [1, 2]]

// Get the text that the user has selected
const getSelectedText = () => window.getSelection().toString();
getSelectedText();

const ResponsiveCardImg = styled(Card.Img)`
    // For screens wider than 768px
    @media(min-width: 768px) {
        // Your responsive styles here.
    }

    // For screens smaller than 768px
    @media(max-width: 768px) {
        // Your responsive styles here.
    }
`

export default function App() {
    return (
        <MainContainer>
            <Container>
                <Card text='white' bg='dark' style={styles.mainCard}>
                <ResponsiveCardImg
                    style={styles.cardImage}
                    onClick={handleClick}
                    src={apeImage}
                    alt='Degenerate Ape Academy'
                />
                <Card.Body>
                    <Card.Title className='text-center' as='h2'>
                    {apeId}
                    </Card.Title>
                </Card.Body>
                </Card>
            </Container>
        </MainContainer>
    );
}

const union = (...arr) => [...new Set(arr.flat())];

// Example
union([1, 2], [2, 3], [3]);     // [1, 2, 3]

const insertionSort = arr =>
  arr.reduce((acc, x) => {
    if (!acc.length) return [x];
    acc.some((y, j) => {
      if (x <= y) {
        acc.splice(j, 0, x);
        return true;
      }
      if (x > y && j === acc.length - 1) {
        acc.splice(j + 1, 0, x);
        return true;
      }
      return false;
    });
    return acc;
  }, []);
  
insertionSort([6, 3, 4, 1]); // [1, 3, 4, 6]

const flat = arr => [].concat.apply([], arr.map(a => Array.isArray(a) ? flat(a) : a));
// Or
const flat = arr => arr.reduce((a, b) => Array.isArray(b) ? [...a, ...flat(b)] : [...a, b], []);

// Or
// See the browser compatibility at https://caniuse.com/#feat=array-flat
const flat = arr => arr.flat();

// Example
flat(['cat', ['lion', 'tiger']]);   // ['cat', 'lion', 'tiger']