Matt Lockyer mattlockyer

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PRs with comments > Issues; Active on Twitter; Bad response time to TG or LinkedIn DMs.

mattlockyer / get-fields.js

Last active January 23, 2020 16:20

Turn JSON / POJO into Firestore Fields for REST API

	//only handles integerValue, doubleValue, stringValue and booleanValue
	const getType = (val) => {
	if (val === null) return 'nullValue'
	const t = typeof val
	switch (t) {
	case 'number': return n % 1 === 0 ? 'integerValue' : 'doubleValue'
	case 'string':
	case 'boolean':
	return t + 'Value'
	}

mattlockyer / hmy_estimateGas_tests.txt

Created February 10, 2020 03:52

Harmony RPC endpoint hmy_estimateGas tests and results

	curl -X GET http://localhost:9500 -H 'Content-Type: application/json' -d '{
	"jsonrpc":"2.0",
	"method":"hmy_estimateGas",
	"params":[{
	"from": "0x7c41e0668b551f4f902cfaec05b5bdca68b124ce",
	"to": "0x7c41e0668b551f4f902cfaec05b5bdca68b124ce",
	"value": "0x1"
	}],
	"id": 1
	}'

mattlockyer / app.js

Last active April 25, 2020 15:30

A waaay simpler redux, redux-thunk friendly setup for reducer, state and actions

	import { getReducer, getState } from '../util/redux-util'
	//default state
	const defaultState = {
	toggle: false
	}
	//reducer
	const type = 'appReducer'
	export const appReducer = getReducer(type, defaultState)
	export const appState = getState(type)
	//actions

mattlockyer / countries.json

Created February 24, 2020 17:58

Country Code to Country Name, Unicode and Flag Emoji

mattlockyer / ebay-scrape.js

Created April 9, 2020 22:18

Scrapes Ebay Prices


	const cheerio = require('cheerio')
	const request = require('request');

	let query = process.env.QUERY
	if (!query) {
	console.log('Please define an ENV var for QUERY="..."')
	return -1
	}
	query = encodeURIComponent(query)

mattlockyer / rename.sh

Created April 30, 2020 23:40

Rename all files of a type in a folder with a sequential number scheme

	a=1
	for i in *.jpg; do
	new=$(printf "%04d.jpg" "$a") #04 pad to length of 4
	mv -i -- "$i" "$new"
	let a=a+1
	done

	# from https://stackoverflow.com/a/3211670/1060487

mattlockyer / contraints.sql

Created May 11, 2020 18:56

Postgres - get constraints from table

	SELECT con.*
	FROM pg_catalog.pg_constraint con
	INNER JOIN pg_catalog.pg_class rel ON rel.oid = con.conrelid
	INNER JOIN pg_catalog.pg_namespace nsp ON nsp.oid = connamespace
	WHERE
	nsp.nspname = '<schema name>'
	AND rel.relname = '<table name>';

	/* from: https://dba.stackexchange.com/a/214877/187757 */

mattlockyer / keybindings.json

Created May 13, 2020 00:57

Keyboard shortcuts for vs code

	[
	{
	"key": "ctrl+]",
	"command": "workbench.action.terminal.focusNext"
	},
	{
	"key": "ctrl+[",
	"command": "workbench.action.terminal.focusPrevious"
	},
	{

mattlockyer / docker.txt

Last active May 21, 2020 20:09

Docker notes if having trouble starting, manual, killing, etc...

	# start docker manually
	sudo rm -rf /var/run/docker.pid; sudo dockerd &

	# kill all docker ps
	ps axf \| grep docker \| grep -v grep \| awk '{print "kill -9 " $1}' \| sudo sh

	# restart as service
	sudo systemctl restart docker

	# build docker

mattlockyer / app.js

Last active May 26, 2020 15:52

Javascript Mutex to prevent re-entry from multiple method calls. Protect methods that modify app, localStorage or IndexedDB.

	import { lock, unlock } from './mutex.js'

	async function processCallsLikeQueue() {
	// stop method calls here
	await lock('processCallsLikeQueue()')
	// ...
	// code to protect from re-entry
	// i.e. prevent multiple simultaneous calls to this part of the code
	// ...
	// let next method call in