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const Switch = ({ on, onToggle }) => (
    <label className={styles.switch} onClick={onToggle}>
        <input
            checked={on}
            type="checkbox"
        />
        <span className={styles.slider} />
    </label>
);

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const mousePosition = () => (BaseComponent) => {
	return class MousePosition extends Component {
		constructor(props) {
			super(props);
			this.state = { x: 0, y: 0 };
		}

		componentDidMount() {
			this.listener = (e) => {
				this.setState(() => ({ x: e.pageX, y: e.pageY }));

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const tween = ({ tween, duration = 1000, defaultStart, end }) => (BaseComponent) => {
	return class Tween extends Component {
		constructor(props) {
			super(props);

			this.state = {
				timeStart: +new Date(),
				start: defaultStart(props) || 0,
				current: defaultStart(props) || 0,
			};

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import { compose, mapProps } from 'recompose'; 

const startX = 0;
const startY = 0;

const FollowingRectangle = compose(
	mousePosition(),
	tween({
		tween: linear,
		duration: 1000,

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const mousePosition = () => (BaseComponent) => {
  return class MousePosition extends Component {
    // ...
 
    render() {
      const { x, y } = this.state;

      return <BaseComponent {...this.props} x={x} y={y} />;
    }
  }

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const tween = ({ tween, duration = 1000, defaultStart, end }) => (BaseComponent) => {
  return class Tween extends Component {
    // ...
	  
    render() {
      const { current } = this.state;

      return <BaseComponent {...this.props} current={current} />
    }
  }

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function createMatrix(a = 1, b = a) {
  return Array.from({ length: a }, () => Array.from({ length: b }, () => 0));
}

// 1 x 10 Matrix
console.log(createMatrix(1, 10));

// Square Matrix
console.log(createMatrix(3));

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Array.from(document.getElementsByTagName('div'));

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function fillArray(length, value = 0) {
  return Array.from({ length }, () => value);
}

console.log(fillArray(10, 0)); // [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
console.log(fillArray(2, null)); // [null, null]

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function dedup(arr) {
  return Array.from(new Set(arr));
};

console.log(dedup([10, 10, 1, 0, 'a', 'b', 'a']));