Tse-Ching Ho tsechingho

Elixir 安装導覧

我們將安裝下列項目：

Elixir
Node.js
Postgresql 資料庫
Phoenix

由於 macOS 及 linux 可以使用 asdf 這個語言版本管理器，所以我們將介紹用它來安裝 elixir 及 nodejs 的方式。而 Windows 則會使用 chocolatey 來安裝。

jq: JSONL → TSV conversion

What is TSV?

TSV means "tab-separated values". I prefer this format over CSV ("comma-separated values") because it doesn't require as much quoting. Many programs that can use CSV formatted data can also use TSV, although they may need to be explicitly told of the different format if it's not detected automatically.

However, in any of the jq scripts below, "@tsv" can usually be replaced with "@csv" to get CSV output instead.

Subdomaining Localhost with Rails 5

I've been following this blog post on how to set up an api-only Rails 5 application. One of the sections talks about creating a subdomain for your api

Rails.application.routes.draw do
  constraints subdomain: "api" do
    scope module: "api" do

1. Gemfile

gem 'browserify-rails', '1.5.0' # until fix: https://github.com/browserify-rails/browserify-rails/issues/101
gem 'react-rails'

Browserify-rails allows to use browserify within assets pipeline. React-rails is here only to allow to use #react_component (and thus, prerendering).

Note that jquery-rails can be removed from Gemfile, the npm version of jquery and jquery-ujs will be used instead.

UPDATE a fork of this gist has been used as a starting point for a community-maintained "awesome" list: machine-learning-with-ruby Please look here for the most up-to-date info!

Resources for Machine Learning in Ruby

Gems

liblinear-ruby: Ruby interface to LIBLINEAR using SWIG

Getting Pow to work in OS X Yosemite

Some parts taken from: https://gist.github.com/kujohn/7209628

ipfw is officially deprecated and removed in OS X Yosemite. Pow requires another program pf to handle the port forwarding.

1. Anchor file

Create file /etc/pf.anchors/pow

	#!/bin/bash

	# This script can be used in "run & hope" mode or you can use it as a recipe to
	# do things manually - you probably want the latter if you really care about
	# the data in your databases.
	# Happy hacking
	# /Eoin/

	# Tell bash to stop if something goes wrong
	set -e

	HTTP status code symbols for Rails

	Thanks to Cody Fauser for this list of HTTP responce codes and their Ruby on Rails symbol mappings.

	Status Code Symbol
	1xx Informational
	100 :continue
	101 :switching_protocols
	102 :processing

	# NullStorage provider for CarrierWave for use in tests. Doesn't actually
	# upload or store files but allows test to pass as if files were stored and
	# the use of fixtures.
	class NullStorage
	attr_reader :uploader

	def initialize(uploader)
	@uploader = uploader
	end

	function requireAll(r) { r.keys().forEach(r); }
	requireAll(require.context('../images/', true, /\..*$/));
	requireAll(require.context('./vendors/', true, /\..*$/));