objects.ts done

[buayyad]

No description provided.

[shereengh]

if (Array.isArray(book.author)) {
book.author.push(additionalAuthor);
} else if (book.author) {
book.author = [book.author, additionalAuthor];
} else {
book.author = [additionalAuthor];
}

No need for else if, just else {
book.author = [book.author, additionalAuthor];
}