This example demonstrates the results of JavaScript array operations by logging computed values to the browser console. It uses D3’s `ascending` import and the native `reduce`, `sort`, and `range` methods to generate an array of 40 numbers, sum them, and sort an array of key-value objects by their keys. The page itself renders only a blank screen with oversized text styling, as all output appears in the console via `console.log`. The source code is defined in `index.js` and loaded through a minimal `index.html` shell.