Jeb Coleman el-feo

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

This post is also on my blog, since Gist doesn't support @ notifications.

Components are taking center stage in Ember 2.0. Here are some things you can do today to make the transition as smooth as possible:

Use Ember CLI
In general, replace views + controllers with components
Only use controllers at the top-level for receiving data from the route, and use Ember.Controller instead of Ember.ArrayController or Ember.ObjectController
Fetch data in your route, and set it as normal properties on your top-level controller. Export an Ember.Controller, otherwise a proxy will be generated. You can use Ember.RSVP.hash to simulate setting normal props on your controller.

I upgraded a small app from ember-cli from 0.1.11 to 0.2.0 today. It took a couple hours. Here are some notes.

Prep

First, I read the release notes.

`ember init`

I recommend committing your changes right before running ember init. That way, you can accept all the overwrites and easily discard the ones you don't want. kellyselden maintains a repo called ember-cli-output that tracks the changes in what ember init generates over time. You can find the v0.2.0 changes here.

TL;DR

9.4 -> 9.5:

sudo pg_dropcluster 9.5 main --stop
sudo service postgresql stop
sudo pg_upgradecluster -m upgrade -k 9.4 main
sudo su postgres -c "/usr/lib/postgresql/9.5/bin/vacuumdb --all --analyze-in-stages"
sudo pg_dropcluster 9.4 main

	// takes a {} object and returns a FormData object
	var objectToFormData = function(obj, form, namespace) {

	var fd = form \|\| new FormData();
	var formKey;

	for(var property in obj) {
	if(obj.hasOwnProperty(property)) {

	if(namespace) {

	#!/bin/bash

	cat $(find app/assets/stylesheets/ -type f) \|
	grep -Eo '\.[a-z]+[a-z0-9_-]*' \| sort \| uniq \| sed s/.// \|

	while read CSS; do
	if ! grep -Erqi "([^(remove\|has)]?class[(:\|=\|[:space:]=>[:space:])][[:space:]\W][(\"\|')][-a-z0-9[:space:]]$CSS\|\\.$CSS\b)" app/views/ vendor/assets/ app/assets/javascripts/; then
	echo $CSS >> unused.scss;
	fi
	done

	<%
	require 'config'
	branch = `git rev-parse --abbrev-ref HEAD`.strip rescue nil
	use_single_db = !Settings.db_per_branch \|\| !branch \|\| branch == 'master'
	branch_spec = (use_single_db ? "" : "_#{branch}").underscore.gsub(/[\.\/\-]/, '_')
	%>

	development:
	<<: *default
	database: app_development<%= branch_spec %>

	# Rake task to help migrating a rails 3 app to rails 4 strong_parameters.
	# The task generates source code for helper methods for each model class
	# to 'permit' the attributes.
	# the generated methods are intended as starting point to copy&paste in the controller
	# and than edit the permitted attributs.
	# Some common names of non-editable attributes are already filtered,
	# like 'id', 'password' or 'created_at'.
	# The output is written to stdout so you can pipe it into a file
	#
	# Dependencies:

	<!doctype html>
	<html lang="en">
	<head>
	<title>Print ZPL from browser</title>
	</head>
	<body>
	<h1>Test page for print ZPL from browser!</h1>

	<script type="text/javascript">
	function printZpl(zpl) {

	-- show running queries (pre 9.2)
	SELECT procpid, age(query_start, clock_timestamp()), usename, current_query
	FROM pg_stat_activity
	WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%'
	ORDER BY query_start desc;

	-- show running queries (9.2)
	SELECT pid, age(query_start, clock_timestamp()), usename, state, application_name, query
	FROM pg_stat_activity
	WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' AND state != 'idle'