Declarative pattern example in JavaScript

declarative.js

const names = ["Han", "Chewbacca", "Luke", "Leia"];

// imperative
const shortNames = [];
for (let i = 0; i < names.length; i++) {
   if (names[i].length < 5) {
      shortNames.push(names[i]);
   }
}

// declarative
const shortNames = names.filter(name => name.length < 5);