Michael Sievers msievers

msievers / example.gemspec

Created September 27, 2012 08:19

Gemspec which includes files from git submodules into resulting gem

	# -- encoding: utf-8 --
	require File.expand_path('../lib/example/version', __FILE__)

	Gem::Specification.new do \|gem\|
	gem.authors = ["John Doe"]
	gem.email = ["[email protected]"]
	gem.description = %q{Write a gem description}
	gem.summary = %q{Write a gem summary}
	gem.homepage = ""

msievers / ungroup_grouped_objects_in_fabricjs.js

Last active October 14, 2022 12:46

Ungroup programatically grouped objects in fabric.js (simply past this code into the "execute" tab of fabricjs kitchensink demo)

	// clear canvas
	canvas.clear();

	// add red rectangl
	canvas.add(new fabric.Rect({
	width: 50, height: 50, left: 50, top: 50, fill: 'rgb(255,0,0)'
	}));

	canvas.add(new fabric.Rect({
	width: 50, height: 50, left: 110, top: 50, fill: 'rgb(255,0,0)'

msievers / amd_sample.js.coffee

Last active December 20, 2015 11:08

Sample with AMD in place

	# assets/javascript/Component.js.coffee
	define ->
	class
	methodEverybodyShouldHave: ->
	# ...

	# assets/javascript/SeatPlan/InputDataSanitizer.js.coffee
	define ->
	class
	sanitize: (data) ->

msievers / de.activemodel.errors.yml

Last active August 29, 2015 14:06

Seamlessly integrated custom rails validator

	de:
	activemodel:
	errors:
	messages:
	distinctness: "müssen unterschiedlich sein"

msievers / i18n_translate_with_references.rb

Last active August 29, 2015 14:07

Monkey patch I18n.translate so it recognizes references encoded as ~> some.other.key

	#
	# config/initializers/i18n_translate_with_references.rb
	#
	module I18n
	class << self
	alias_method :original_translate, :translate

	def translate(*args)
	regexp = /\A~>(.*)\Z/ # e.g. ~> some.other.key

msievers / prepend_to_singleton_class_via_inherited.rb

Created October 10, 2014 15:08

Prepend module code to subclasses by prepending to it's instances singleton_class via inherited

	module InheritedHandler
	def inherited(subclass)
	subclass.instance_eval do
	alias :original_new :new

	def self.inherited(subsubclass)
	subsubclass.extend(InheritedHandler)
	end

	def self.new(*args, &block)

msievers / application_helper.rb

Created November 20, 2014 11:11

Render templates only if they exist (with fallback option)

	module ApplicationHelper
	# https://coderwall.com/p/ftbmsa (Render template if exists in Rails)
	def try_to_render(partial_path, options = {})
	fallback = options.delete(:fallback_to)
	prefixes = partial_path.split("/")[0..-2].presence \|\| controller._prefixes
	partial_name = partial_path.split("/").last

	if lookup_context.exists?(partial_name, prefixes, true) # "true" is crucial !
	render partial_path, options
	else

msievers / ApplicationHelper.rb

Last active August 29, 2015 14:18

An attempt for a render_relative for rails

	# e.g. inside app/views/records/show.html.erb use
	#
	# <%= render_relative "./record/title" %>
	#
	# to render app/views/records/show/record/title

	module App::ApplicationHelper
	def render_relative(relative_partial_path, locals = {}, &block)
	calling_file_directory = @virtual_path.split("/")[0..-2].join("/")
	partial_path = File.join(calling_file_directory, relative_partial_path)

msievers / [Ruby] mri.rb

Last active October 25, 2018 05:58

Example for hijacking ruby via FFI and using native structs and functions

	require "ffi"

	module MRI
	extend FFI::Library
	ffi_lib [FFI::CURRENT_PROCESS, "ruby"]

	attach_function :rb_str_resize, :rb_str_resize, [:pointer, :long], :pointer

	def self.sizeof(type)
	Class.new(FFI::Struct) do

msievers / [Docker] overlay-docker-systemd.sh

Last active October 25, 2018 05:57 — forked from cpswan/overlay-docker-systemd.sh

Configure systemd to use overlay file system for Docker

	sudo mkdir /etc/systemd/system/docker.service.d
	sudo bash -c 'cat <<EOF > /etc/systemd/system/docker.service.d/overlay.conf
	[Service]
	ExecStart=
	ExecStart=/usr/bin/docker daemon -H fd:// --storage-driver=overlay
	EOF'
	sudo systemctl daemon-reload
	sudo systemctl restart docker