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JavaScript & the browser·Module C6 · Lesson 11
TaskQuick recap. Inside <script type='module'>: write function* range(n) yielding 1..n. Sum them with reduce inside a try block: const total = [...range(4)].reduce((a,b) => a+b, 0). console.log(total) — should print 10. Also catch any error (none expected) and log 'no error'.

Recap: Iterators, fetch, errors (C4-C6)

50 XP5 min
Theory

Quick recap — Modules C4-C6

Async patterns and iteration. The 4 pieces that show up in every real codebase:

  1. `for...of` — iterate any iterable: arrays, Maps, Sets, generators, NodeLists.
  2. **function* generator** — yield values lazily. for-of consumes them.
  3. `try/catch` around `await` — the rejection path. Without it, unhandled rejections bring down Node and noise up the browser.
  4. `Array.prototype.reduce` — sum, group, build any aggregate in one pass.

If any feels random, redo C5-03 / C6-04 / C4-07 / C5-09 then come back.

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