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takeUntil over iterable of promises
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function takeUntil(iterable, predicate) { | |
return takeUntilImpl(iterable[Symbol.iterator](), predicate); | |
} | |
function takeUntilImpl(iterator, predicate) { | |
var nextResolve; | |
var isDone = false; | |
var nextPromise = new Promise(r => nextResolve = r); | |
iterator.next().then(function (value) { | |
if (!predicate(value)) { | |
nextResolve({ done: true }); | |
} else { | |
nextResolve({ done: false, value }); | |
nextPromise = takeUntil(iterator).next(); | |
} | |
}); | |
return { | |
next() { | |
return nextPromise; | |
} | |
}; | |
} |
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