paulbreslin’s gists

paulbreslin / parallel-async-await.js

Last active March 27, 2018 03:25

	// API
	router.get('/words', async (req, res) => {
	const wordsRef = db.ref(`words`).once('value');
	const usersRef = db.ref(`users`).once('value');
	const values = await Promise.all([wordsRef, usersRef]);
	const wordsVal = values[0].val();
	const userVal = values[1].val();
	res.sendStatus(200);
	});

paulbreslin / client-read.js

Created July 4, 2017 14:30

	fetch('https://your-domain.com/api/words')
	.then( response => response.json())
	.then( json => {
	// Handle data
	})
	.catch( error => {
	// Error handling
	});

paulbreslin / firebase-snapshot.js

Last active July 5, 2017 14:25

	// API
	router.get('/words', async (req, res) => {
	const {userId} = req.query;
	const wordsSnapshot = await db.ref(`words/${userId}`).once('value');

	// BAD
	res.send(wordsSnapshot.val())

	// GOOD
	const response = Object.assign({}, snapshot.val());

paulbreslin / promise-chain-async-error-handling.js

Last active July 3, 2017 23:49

	const example = require('example-library');

	const runDemo = async () => {
	try {
	const fistResponse = await example.firstAsyncRequest();
	const secondResponse = await example.secondAsyncRequest(fistResponse);
	const thirdAsyncRequest = await example.thirdAsyncRequest(secondResponse);
	}
	catch (error) {
	// Handle error

paulbreslin / promise-chain-async.js

Last active July 3, 2017 23:50

	const example = require('example-library');

	const runDemo = async () => {
	const fistResponse = await example.firstAsyncRequest();
	const secondResponse = await example.secondAsyncRequest(fistResponse);
	const thirdAsyncRequest = await example.thirdAsyncRequest(secondResponse);
	};

	runDemo();

paulbreslin / promise-chain.js

Last active May 22, 2018 22:31

	const example = require('example-library');

	example.firstAsyncRequest()
	.then( fistResponse => {
	example.secondAsyncRequest(fistResponse)
	.then( secondResponse => {
	example.thirdAsyncRequest(secondResponse)
	.then( thirdAsyncResponse => {
	// Insanity continues
	});

paulbreslin / firebase-chain.js

Last active July 3, 2017 16:29

	router.post('/words', async (req, res) => {
	const {userId, word} = req.body;
	const definition = await fetch(`https://words-api.com/definition/${word}`).json();
	const wordData = {
	word,
	definition
	};
	db.ref(`words/${userId}`).set({wordData};
	});

paulbreslin / firebase-read-promise.js

Last active July 3, 2017 23:13

	// API
	router.get('/words', (req, res) => {
	const {userId} = req.query;
	db.ref(`words/${userId}`).once('value')
	.then( snapshot => {
	res.send(snapshot.val());
	});
	});

paulbreslin / firebase-read.js

Last active July 3, 2017 16:15

	// API
	router.get('/words', async (req, res) => {
	const {userId} = req.query;
	const wordsSnapshot = await db.ref(`words/${userId}`).once('value');
	res.send(wordsSnapshot.val())
	});

paulbreslin / firebase-write-error-handling.js

Last active July 3, 2017 18:20

	// API
	router.post('/words', (req, res) => {
	const {userId, word} = req.body;
	db.ref(`words/${userId}`).push({word}, error => {
	if (error) {
	res.sendStatus(500);
	// Log error to external service, e.g. Sentry
	} else {
	res.sendStatus(201);
	}

Paul Breslin paulbreslin