hoegertn

exports.handler = (event, context, callback) => {
  'use strict';
  const request = event.Records[0].cf.request;
  const userAgent = request.headers['user-agent'][0].value;
  
  let prerender = 0;
  // user agent is known social bot
  if (userAgent.match(/baiduspider|twitterbot|facebookexternalhit|googlebot|bingbot|yandex|rogerbot|linkedinbot|embedly|quora link preview|showyoubot|outbrain|pinterest|slackbot|vkShare|W3C_Validator/i)) {
    prerender = 1;
  }

heygrady

Redux modules

Our applications have grown organically and our current collection of actions, reducers and selectors are due for an upgrade. This document is an attempt to outline an better way to organize our redux code.

The biggest changes here are the introduction of "modules" and redux-sagas.

Core concepts

• modules — a grouping of actions, constants, reducers, etc. that all deal with the same portion of the state.
• actions — action creators

heygrady

Redux containers: mapDispatchToProps

This document details some tips and tricks for creating redux containers. Specifically, this document is looking at the mapDispatchToProps argument of the connect function from [react-redux][react-redux]. There are many ways to write the same thing in redux. This gist covers the various forms that mapDispatchToProps can take.

uhho

def s3_to_pandas(client, bucket, key, header=None):

    # get key using boto3 client
    obj = client.get_object(Bucket=bucket, Key=key)
    gz = gzip.GzipFile(fileobj=obj['Body'])
    
    # load stream directly to DF
    return pd.read_csv(gz, header=header, dtype=str)

def s3_to_pandas_with_processing(client, bucket, key, header=None):

learner-long-life

How to get on Rinkeby Testnet in less than 10 minutes

Following instructions from the excellent https://www.rinkeby.io/

Synchronizing a Full Node

A full node lets you access all state. There is a light node (state-on-demand) and wallet-only (no state) instructions as well,

tejacques

import * as React from 'react';
import { Component } from 'react';

export default function HOCBaseRender<Props, State,  ComponentState>(
    Comp: new() => Component<Props & State, ComponentState>) {
    return class HOCBase extends Component<Props, State> {
        render() {
            return <Comp {...this.props} {...this.state}/>;
        }
    }