OpdrachtQuick 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) β should print 10. Also catch any error (none expected) and log 'no error'.
Recap: Iterators, fetch, errors (C4-C6)
50 XP5 min
Theorie
Quick recap β Modules C4-C6
Async patterns and iteration. The 4 pieces that show up in every real codebase:
- `for...of` β iterate any iterable: arrays, Maps, Sets, generators, NodeLists.
- **
function*generator** β yield values lazily.for-ofconsumes them. - `try/catch` around `await` β the rejection path. Without it, unhandled rejections bring down Node and noise up the browser.
- `Array.prototype.reduce` β 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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