daniellansun commented on PR #2987:
URL: https://github.com/apache/groovy/pull/2987#issuecomment-6250654658
Here is the JavaScript solution:
```JS
let n = 0;
const stream = new ReadableStream({
pull(controller) {
n += 1;
if (n === 3) {
controller.error(new Error('sensor failed')); // close with the cause
return;
}
controller.enqueue(n * n);
}
});
const seen = [];
try {
for await (const value of stream) {
seen.push(value);
}
} catch (failure) {
console.log(failure.message); // sensor failed
}
```
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