Nelson nelsonic

A vision for data interchange in Elm

How do you send information between clients and servers? What format should that information be in? What happens when the server changes the format, but the client has not been updated yet? What happens when the server changes the format, but the database cannot be updated?

These are difficult questions. It is not just about picking a format, but rather picking a format that can evolve as your application evolves.

Literature Review

By now there are many approaches to communicating between client and server. These approaches tend to be known within specific companies and language communities, but the techniques do not cross borders. I will outline JSON, ProtoBuf, and GraphQL here so we can learn from them all.

$ cd ~/Library/Application\ Support/Postgres/var-10
$ \rm -f postmaster.pid

OR

$ \rm -f ~/Library/Application\ Support/Postgres/var-10/postmaster.pid

Salesforce OAuth 2.0 JWT Bearer Token Flow Walk-Through

This document will walk you through how to create or configure a Salesforce application for use with JWT authentication. These configuration steps and the example code works as of Salesforce API version 42.0.

Prerequisites

Create an RSA x509 private key/certification pair

On Mar 28, 2013 Dan Allen explained how to deploy to github-pages automatically. Many other GitHub users like Steve Klabnik and Domenic Denicola followed with the same approach:

Use an OAuth token with public_repo or repo permission to access the Github account over HTTPS inside a virtual build environment.

The same applies to Travis CI's built-in abilities, and there are more restrictions as deploying GitHub Releases works only for tags, not for branches.

Security concerns

The token grants write access for all of your (public) repositories and

Renaming table in Ecto migration

I recently wanted to rename a model and its postgres table in a Phoenix app. Renaming the table was simple and documented, but the table also had constraints, sequences, and indexes that needed to be updated in order for the Ecto model to be able to rely on default naming conventions. I couldn't find any examples of what this would look like but was eventually able to figure it out. For anyone else in the same situation, hopefully this example helps.

In the example below, I'm renaming the Permission model to Membership. This model belongs to a User and an Account, so it has foreign key constraints that need to be renamed.

defmodule MyApp.Repo.Migrations.RenamePermissionsToMemberships do
  use Ecto.Migration

Update: As package.elm-lang.org IP address has been changed and is not blocked anymore as far as I know, these proxies have been disabled. If you still need them, add a comment describing why.

Here is how to use the proxies:

Packages documentation

Two options:

	let params = {
	TableName: 'xxx',
	Limit: 50 // Configure based on needs
	};
	let aItems = [];
	const recursiveScan = (params) => {
	return client.scan(params).promise().then((data) => {
	// Simple Changes to input, optional
	let newItems = data.Items.map((item) => {
	return item;

	# from https://codeburst.io/how-i-hacked-my-terminal-so-a-happy-whale-would-spout-software-quotes-at-me-6791e6c74fc6

	%
	Simple things should be simple, complex things should be possible.
	The Wiki Way: Quick Collaboration on the Web, Bo Leuf, Ward
	Cunningham
	%
	Simplicity is the soul of efficiency.
	Austin Freeman
	%

	<!-- Copyright 2011 the Dart project authors. All rights reserved.
	Use of this source code is governed by a BSD-style license
	that can be found in the LICENSE file. -->

	<h2>Dr. Fibonacci's Sunflower Spectacular</h2>

	<div>
	<canvas id="canvas" width="300" height="300"></canvas>
	</div>

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