𝗧𝗵𝗲 𝗘𝗮𝗌𝘆 𝗪𝗮𝘆 𝗧𝗼 𝗜𝗻𝗱𝗲𝘅 𝗮𝗻𝗱 𝗢𝗿𝗴𝗮𝗻𝗶𝘇𝗲 𝗗𝗮𝘁𝗮 𝗶𝗻 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁

𝗧𝗵𝗲 𝗘𝗮𝗌𝘆 𝗪𝗮𝘆 𝗧𝗼 𝗜𝗻𝗱𝗲𝘅 𝗮𝗻𝗱 𝗢𝗿𝗴𝗮𝗻𝗶𝘇𝗲 𝗗𝗮𝘁𝗮 𝗶𝗻 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 You need to organize arrays of objects. You can use reduce to do this. But reduce can make code complex and hard to understand.

Good news: there's a simpler way to do this using Object.groupBy and Map.groupBy methods.

• These methods help you group data by a key.
• They make your code more readable and easier to understand.

Why group data?

• Grouping data improves performance.
• It makes searches and data consumption easier.

Here's an example: You have a list of products. You want to group them by category. You can use Object.groupBy to do this:

const products = [
  { name: "iPhone", category: "electronics", price: 5000 },
  { name: "Laptop", category: "electronics", price: 3000 },
  { name: "T-shirt", category: "clothing", price: 50 },
  { name: "Pants", category: "clothing", price: 120 },
];
const productsByCategory = Object.groupBy(products, (product) => product.category);

Map.groupBy handles cases where the key is not a string. 
- It preserves the original type of the key.
- It avoids automatic conversions and ambiguities.

These new grouping methods simplify your development routine. 
- They make your code leaner and more expressive.
- They are widely supported in modern browsers.

Source: https://dev.to/sucodelarangela/groupby-in-javascript-the-easy-way-to-index-and-organize-data-53op