NISHIGUCHI Masatoshi mnishiguchi

Inky pHAT name badge example

About

Inky pHAT is an electronic paper (ePaper / eInk / EPD) display for Raspberry Pi.

Let's do something similar to Pimoroni's Inky pHAT name badge example in Elixir. Here is Pimoroni's Python code.

This Youtube video Raspberry Pi, eInk and Nerves with Livebook by Underjord introduces you the basics of Inky on Nerves firmware.

Rails - redirect - friendly forwarding

A: Using session

https://www.mnishiguchi.com/2016/07/15/friendly-forwarding-in-rails/

B: Using querystring

QuestionsController

JS - URL

getParameterByName

https://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript/901144#901144

Ensure valid web url - Prepend url scheme if necessary

// Prepends "http://" to a URL that doesn't already contain "http://"
const prependUrlScheme = url =&gt; {

Rails google places client

https://github.com/qpowell/google_places

Gemfile

gem 'google_places'

Make a PORO

React - some interesting libraries

Rails asset bundles and page specific js

Most of the time, I think it is best to have default application.js with page specific execution.

A: Single asset bundle vs multiple asset bundles

We can create a multiple asset bundles instead of default application.js.
Pros: Useful if some code is used only on certain occasions.
Cons: More http requests.
任意のviewのみで、特定のjsを読み込む方法
https://schneems.com/2017/11/22/self-hosted-config-introducing-the-sprockets-manifestjs/

React form ignore enter press

christianalfoni/formsy-react#360 (comment)

    <form
      action="/users/sign_up"
      onSubmit={handleSubmit}
      onKeyPress={event => {
        if (event.which === 13 /* Enter */) {
 event.preventDefault();

	<!DOCTYPE html>
	<html>

	<head>
	<meta ,="" charset="UTF-8" content="text/html" http-equiv="Content-Type" />
	<meta content="width=device-width, initial-scale=1.0" name="viewport" />
	<meta name="csrf-param" content="authenticity_token" />
	<meta name="csrf-token" content="UvxigyfFwCsdAvRdbYGNeJ5dqFeqao1e59gYYTg7SUfDO0Buwx7rNHtPxuy6OwRj81BrQg0CeqnCRFpNQB4now==" />

	<title>DeviseWithFormik</title>

	<!DOCTYPE html>
	<html>

	<head>
	<meta ,="" charset="UTF-8" content="text/html" http-equiv="Content-Type" />
	<meta content="width=device-width, initial-scale=1.0" name="viewport" />
	<meta name="csrf-param" content="authenticity_token" />
	<meta name="csrf-token" content="9QmqNhGdQyVYHWZHUEpR9xawbQEuMVtPTXfzUOTq4vzg4u9Adux5sLEerlz+yrFxEAVVVX1fEl1YFrSW0ZtcZA==" />

	<title>DeviseWithFormik</title>