.map
Let's Goooooooooo
Map can transform the array. It doesn't change or mutate the old one, it creates a new one.
you can do this really neat...
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If you want only a subset of the array, you can use the filter method.
using the
const books = [
{title:
The Great Gatsby, author:Fitzgerald, sales: 2},{title:
Odyssey, author:Homer, sales: 1889},{title:
Hyacinth, author:Julien Linde, sales: 275},{title:
Goldfinch, author:Tart, sales: 1089},{title:
War and Peace, author:Tolstoy, sales: 789}];
const authorName = books.filter(book=>book.author.startsWith("T"))
If you console.log authroName, you get back some the objects for Goldfinch and War and Peace.
You can chain the filters though...
const authorName = books.filter(book=>book.author.startsWith("T") && book.sales >=1000);
If you want just one, you can use the .find
const authorName = books.find(book=>book.author.includes("Tart") && book.sales >=1000);
.includes for string is case sensitive