Raphael rwichmann
EECOLOR
/ throttledChildAdded.js
Last active
July 2, 2019 22:37
— forked from iclems/Firebase Lazy-Safe Iterator
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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| module.exports = function throttledChildAdded(ref, callback, onError, sortChildKey = null /* uses `key` if null */) { | |
| const state = { stopped: false } | |
| let listener = null | |
| throttledChildAdded({ state, endReached: lastSeen => { listener = listenForNewChildren({ startAfter: lastSeen }) } }) | |
| return () => { | |
| state.stopped = true | |
| if (listener) ref.off('child_added', listener) |
nyg
/ iOSCreatePDF.swift
Last active
April 2, 2024 11:09
iOS, Swift: Create a PDF file from an HTML string.
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| // Thanks to http://www.labs.saachitech.com/2012/10/23/pdf-generation-using-uiprintpagerenderer | |
| // Note: including images in the HTML won't work, see here: | |
| // https://github.com/nyg/HTMLWithImagesToPDF | |
| import UIKit | |
| // 1. Create a print formatter | |
| let html = "<b>Hello <i>World!</i></b>" | |
| let fmt = UIMarkupTextPrintFormatter(markupText: html) |