JS 2022
Array.at accepts negative indexes to count from the end. Object.hasOwn offers a direct own-property check.
Where to run this
This example uses the JavaScript console playground. Select Run to execute it; the example does not run on this lesson page.
A practical example
const tools = ["Brush", "Tape"];
console.log(tools.at(-1));
console.log(Object.hasOwn({places: 12}, "places"));
What happens
The results are Tape and true.