Matt hew

full stack engineer. hard problems enjoyer

davidkpiano / reducer-with-effects.js

Last active August 20, 2021 18:58

An idea for actor-model-based effects with reducers

	import {
	useReducerWithEffects,
	// hand-wavey, but meant to be used by React to create something
	// external will produce async values sent to components
	createEffect
	} from 'react';

	function fetchUserEffect(id, parentRef) {
	const controller = new AbortController();
	const signal = controller.signal;

damianrr / amplify-function-graphql-cognito.js

Last active March 6, 2020 22:42

How to query/mutate AppSync's GraphQL from within Amplify's lambda functions by login into Cognito user pool and reusing Authorization token.

	const R = require('ramda');
	const aws = require("aws-sdk");
	const { GraphQLClient } = require("graphql-request");

	aws.config.update({
	region: process.env.REGION
	});
	const cognitoidentityserviceprovider = new aws.CognitoIdentityServiceProvider({
	apiVersion: "2016-04-18"
	});

undefobj / index.js

Last active August 17, 2022 18:28

Calling AppSync from Lambda

	const https = require('https');
	const AWS = require("aws-sdk");
	const urlParse = require("url").URL;
	const appsyncUrl = process.env.API_BACKENDGRAPHQL_GRAPHQLAPIENDPOINTOUTPUT;
	const region = process.env.REGION;
	const endpoint = new urlParse(appsyncUrl).hostname.toString();
	const graphqlQuery = require('./query.js').mutation;
	const apiKey = process.env.API_KEY;

	exports.handler = async (event) => {

alex35mil / Promise.re

Created October 11, 2018 14:37

	let all = Js.Promise.all;

	let resolve = Js.Promise.resolve;

	let reject = Js.Promise.reject;

	let andThen =
	(p: Js.Promise.t('a), fn: 'a => Js.Promise.t('b)): Js.Promise.t('b) =>
	p->Js.Promise.then_(fn, _);

mhallin / App.re

Created August 6, 2018 11:45

Async import pattern

	PageModule.fetchModule("./MyComponent")
	\|> Js.Promise.then_(m => send(SetRootElement(m())));

phpnode / match.js

Created April 30, 2018 19:25


	const invalidMatchSignal = new Error();

	function makeProxyThrower(input) {
	return new Proxy(input, {
	get(target, prop, receiver) {
	if (prop in target) {
	const result = Reflect.get(target, prop, receiver);
	if (typeof result === "object" && result !== null) {
	return makeProxyThrower(result);

busypeoples / FormExample.re

Created April 23, 2018 00:20

Form Example in ReasonML

	type validation('a) =
	\| NotEmpty
	\| Custom('a);

	type t = string;

	let validate = (rule, value, values) =>
	switch (rule) {
	\| NotEmpty => String.length(value) > 0
	\| Custom(fn) => fn(value, values)

Zerim / SignupForm.re

Last active February 19, 2018 23:25

A simple SignupForm written in ReasonML

	/* `action` and `state` types must be defined before the `let component` statement for type inference to work */
	type action =
	\| UpdateEmail string
	\| UpdatePassword string;

	type state = {
	email: string,
	password: string
	};

lilactown / promises.re

Last active August 20, 2022 07:56

Notes on using JavaScript Promises in ReasonML/BuckleScript

	/**
	* Making promises
	*/
	let okPromise = Js.Promise.make((~resolve, ~reject as _) => [@bs] resolve("ok"));

	/* Simpler promise creation for static values */
	Js.Promise.resolve("easy");

	Js.Promise.reject(Invalid_argument("too easy"));

bcomnes / postcss.config.js

Created March 23, 2017 18:53