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CHALLENGE const nums = [40, 100, 1, 5, 25, 10]; nums.sort(); console.log(nums.join(' '));

CHALLENGE class Range { #start; #end; constructor(start, end) { this.#start = start; this.#end = end; } [Symbol.iterator]() { let current = this.#start; const end = this.#end; return { next() { return current < end ? { value: current++, done: false } : { value: undefined, done: true }; }, [Symbol.iterator]() { return this; } }; } } const range = new Range(1, 5); const arr1 = [...range]; const arr2 = [...range]; const sum = arr1.reduce((a, b) => a + b, 0); console.log(arr1.join(','), arr2.join(','), sum);

CHALLENGE const log = []; async function a() { log.push('a-start'); await b(); log.push('a-end'); } async function b() { log.push('b-start'); await Promise.resolve(); log.push('b-end'); } a(); log.push('sync-end'); setTimeout(() => console.log(log.join(',')), 0);