some and every

Ask whether one or all elements pass a test.

some_every.js

const limit = 10;
const levels = [8, 9, 10];
const anyExact = levels.some((level) => level === limit);
const allWithin = levels.every((level) => level <= limit);

console.log("limit=" + limit);
console.log("anyExact=" + anyExact);
console.log("allWithin=" + allWithin);

some-every `some` answers whether at least one element passes the callback test. `every` answers whether all elements pass it.