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/ Firebase Lazy-Safe Iterator
Last active
June 21, 2018 09:48
This snippet enables to iterate over a Firebase reference in a non-blocking way. If you need to iterate over a large reference, a child_added query may block your Firebase as it will query the whole data before iteration. With this snippet, children are retrieved one by one, making it slower / safer.
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| // By Clément Wehrung | |
| function Iterator(queueRef, processingCallback) { | |
| this.queueRef = queueRef; | |
| this.processingCallback = processingCallback; | |
| this.processed = {}; | |
| this.processNext(); | |
| } | |
| Iterator.prototype.processNext = function() { |