MartinHeimbring’s gists

MartinHeimbring / Serialize ruby objects

Created April 3, 2015 19:40

Automate creating a #to_json method for an object (in order to serialize the properties) by inheriting from a class that does exactly this

	class JSONable
	# serialize object to json
	def to_json
	hash = Hash.new
	self.instance_variables.each do \|ivar\|
	hash[ivar] = self.instance_variable_get ivar
	end
	hash.to_json
	end

MartinHeimbring / error messages partial

Last active August 29, 2015 14:15

Form error messages w/ bootstrap (from MIchael Hartl Tutorial)

	<!-- _error_messages.html.erb -->

	<% if @user.errors.any? %>
	<div id="error_explanation">
	<div class="alert alert-danger">
	The form contains <%= pluralize(@user.errors.count, "error") %>.
	</div>
	<ul>
	<% @user.errors.full_messages.each do \|msg\| %>
	<li><%= msg %></li>

MartinHeimbring / application.rb

Last active August 29, 2015 14:15 — forked from bogdanconstantinescu/application.rb

	ActionView::Base.field_error_proc = Proc.new do \|html_tag, instance\|
	html = %(<div class="field_with_errors">#{html_tag}</div>).html_safe
	# add nokogiri gem to Gemfile

	form_fields = [
	'textarea',
	'input',
	'select'
	]

MartinHeimbring / bootstrap flash_messages partial

Created February 15, 2015 11:16

associate right bootstrap class with flash key

	- flash.each do \|type, message\|
	%div{ class: "alert #{bootstrap_class_for(type)}" }
	%button.close{ :data => { :dismiss => "alert" } } x
	= message


	# From application helper

	def bootstrap_class_for flash_type

MartinHeimbring / hashquiz.rb

Last active August 29, 2015 14:15 — forked from potatosalad/hashquiz.rb

	#require 'rubygems'
	require 'pp'
	#require 'ap' # Awesome Print

	class Object
	# expects [ [ symbol, *args ], ... ]
	def recursive_send(*args)
	args.inject(self) { \|obj, m\| obj.send(m.shift, *m) }
	end
	end

MartinHeimbring / Benchmark: Lookup time (string vs.symbol as key)

Created February 8, 2015 14:32

Using the Benchmark module to compare lookup time in hash

	require 'benchmark'

	stringAZ = Hash[("a".."z").to_a.zip((1..26).to_a)]
	symbolAZ = Hash[(:a..:z).to_a.zip((1..26).to_a)]

	string_time = Benchmark.realtime do
	100_000.times{stringAZ["r"]}
	end

	symbol_time = Benchmark.realtime do

MartinHeimbring / The & Operator in Ruby

Created January 29, 2015 16:03

Different ways to use the & operator for everyday operations

	###################################################
	# calling a proc on a collection of numbers
	increment_by_1 = proc { \|n\| n + 1 }
	# the & converts the proc into a block that is then invoked on each item in the collection
	[1,2,3].map(&increment_by_1)
	# returns [2, 3, 4]

	###################################################
	# calling a lambda on a collection of numbers
	incrememnt_by_1 = ->(n){n+1}

MartinHeimbring / Yield Self example

Last active August 29, 2015 14:14

Yield Self in initialize

	# No yielding

	class Person
	attr_accessor :first, :last
	def initialize(first = nil, last = nil)
	@first = first
	@last = last
	end
	def hello
	puts "#{@first} #{@last} says hello!"

MartinHeimbring / Bootstrap 3 Navbar Haml

Created January 28, 2015 13:26

Bootstrap 3 Navbar Haml

	%nav.navbar.navbar-default{role: "navigation"}
	/ Brand and toggle get grouped for better mobile display
	.navbar-header
	%button.navbar-toggle{"data-target" => ".navbar-ex1-collapse", "data-toggle" => "collapse", type: "button"}
	%span.sr-only Toggle navigation
	%span.icon-bar
	%span.icon-bar
	%span.icon-bar
	%a.navbar-brand{href: "#"} Brand
	/ Collect the nav links, forms, and other content for toggling

MartinHeimbring / Devise session form bootstrap

Created January 19, 2015 21:19

Devise session form styled with bootstrap

	%h2.text-center Sign in
	%br/
	= form_for(resource, as: resource_name, url: session_path(resource_name), html: {class: 'form-horizontal'}) do \|f\|
	.form-group
	= f.label :email, class: "col-sm-2 control-label"
	.col-sm-6
	= f.email_field :email, autofocus: true , class: "form-control"
	.form-group
	= f.label :password, class: "col-sm-2 control-label"
	.col-sm-6