app/assets/javascripts/components/components/Books.js
import React, { Component } from 'react';
import Book from './Book';
export default class Books extends Component {
render() {
const { books } = this.props;
let bookNodes = books.map((book) => {
return <Book key={book.id} book={book} />
});
return <div className="row">{bookNodes}</div>
}
}