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@zachboyd
zachboyd / AWSSubscriptionClient.ts
Last active September 22, 2022 15:09
Appsync Subscription support for subscriptions-transport-ws
import { uniqBy } from 'lodash';
import { ClientOptions, SubscriptionClient } from 'subscriptions-transport-ws';
export class AWSSubscriptionClient extends SubscriptionClient {
constructor(
url: string,
options?: ClientOptions,
webSocketImpl?: any,
webSocketProtocols?: string | string[]
) {
@dabit3
dabit3 / SubscriptionHook.js
Last active January 26, 2021 16:04
Example of using custom React hooks for managing GraphQL subscriptions
import { useEffect, useState } from 'react'
import { API, graphqlOperation } from 'aws-amplify'
const ListTalks = `
query {
listTalks {
items {
name
description
presenter {
declare class ReactTrelloBoard<CardMetaData> extends React.Component<ReactTrello.BoardProps<CardMetaData>> {
}
declare module ReactTrello {
/**
* react-trello uses `React.cloneElement`, so these props
* will have to be added to `defaultProps`, otherwise
* TypeScript will (understandably) freak out.
*/
interface NewCardTemplateProps<CardMetaData = object> {
@jlafon
jlafon / dynamodb.md
Created December 3, 2014 05:03
An Introduction to Amazon's DynamoDB

An introduction to DynamoDB

DynamoDB is a powerful, fully managed, low latency, NoSQL database service provided by Amazon. DynamoDB allows you to pay for dedicated throughput, with predictable performance for "any level of request traffic". Scalability is handled for you, and data is replicated across multiple availability zones automatically. Amazon handles all of the pain points associated with managing a distributed datastore for you, including replication, load balancing, provisioning, and backups. All that is left is for you to take your data, and its access patterns, and make it work in the denormalized world of NoSQL.

Modeling your data

The single most important part of using DynamoDB begins before you ever put data into it: designing the table(s) and keys. Keys (Amazon calls them primary keys) can be composed of one attribute, called a hash key, or a compound key called the hash and range key. The key is used to uniquely identify an item in a table. The choice of the primary key is particularl

@henrik
henrik / eu_country_codes.rb
Last active December 20, 2023 12:20
EU (European Union) country codes, ISO 3166-1 alpha-2. (This Gist is from 2012. Please see comments for updates.)
# Note: VAT identification numbers for Greece use "EL", not "GR".
COUNTRY_CODES_EU = %w[
AT BE BG CY CZ DK EE FI FR DE GR HU IE IT
LV LT LU MT NL PL PT RO SK SI ES SE GB
]