micahriggan’s gists

micahriggan / sendToMany.sol

Last active October 10, 2018 20:41

Send tokens or ether to many addresses

micahriggan / SimpleContract.sol

Created October 27, 2018 00:14

	pragma solidity ^0.4.24;

	contract SimpleContract {
	uint public paymentCount = 0;

	event PaymentReceived(uint value, address sender);

	address public owner;

	constructor() public {

micahriggan / PayToSignatureHash.sol

Last active November 3, 2018 00:52

Testing the concept of paying to signature hash. A redeemer spends by calling sendTo with a signed hash that has a balance in the contract.


	pragma solidity ^0.4.24;
	contract PayToSignatureHash {

	mapping(bytes32 => uint) public balances;


	function payToHash(bytes32 hash) public payable {
	balances[hash] += msg.value;
	}

micahriggan / serial-promises.js

Created March 23, 2019 21:59

Serial Promises vs Parallel Promises

	function wait(waitTime) {
	return new Promise(resolve => setTimeout(() => {
	console.log(`waited ${waitTime} ms`)
	resolve()
	}, waitTime));
	}

	async function serial() {
	console.time('serial');
	await wait(1000);

micahriggan / data-dependencies.js

Created March 23, 2019 22:24

Adding async values that are fetched in parallel vs serially

	function randomNumber() {
	const rand = Math.random() * 100;
	return new Promise(resolve => setTimeout(() => {
	resolve(rand)
	}, 1000))
	}

	async function addExampleSerial() {
	console.time('add-serial');
	const number1 = await randomNumber();

micahriggan / 3-async-dependencies.js

Last active March 25, 2019 21:02

Asynchronous calls which depend on the result of another asynchronous call

	function fetchData(data) {
	return new Promise(resolve => setTimeout(() => {
	resolve(data)
	}, 1000))
	}

	function getLoggedInUser() {
	return fetchData('user1');
	}

micahriggan / 1-simple-generics.ts

Created March 26, 2019 00:18

Example to show a typesafe way to log values from objects

	/* given an object of type T,
	* log the value of a property, specified by the argument key
	*/
	function logValue<T>(obj: T, key: keyof T) {
	console.log(obj[key]);
	}

	function simpleTest() {
	const Micah = {name: 'Micah'};
	logValue(Micah, "name")

micahriggan / 2-bad-table-example.ts

Created March 26, 2019 00:41

Showing the errors that can occur from using any instead of a generic

micahriggan / 3-generic-table-example.ts

Last active March 26, 2019 01:58

A typesafe example using generics

micahriggan / 1-destructure.js

Created March 26, 2019 02:32

Some simple destructuring examples

	function getPeople() {
	return [{name: "Bob"}, {name: "Sam"}, {name: "Tom"}];
	}
	function test1() {
	const [firstPerson] = getPeople();
	console.log(firstPerson);
	}
	function test2() {
	const [firstPerson, ...rest] = getPeople();
	console.log(rest);