tomdalling

OPERATORS = ['+', '-']
ROUNDS = 2
MAX_NUMBER = 9

puts 'What is your name?'
name = gets.chomp
puts "Welcome to Arithmetic Tutor, #{name}!"

results = (1..ROUNDS).map do 
  left = rand(MAX_NUMBER + 1)

tomdalling

//
//  Copyright 2012. All rights reserved.
//

static const int StandingHeight = 2;
static const int CrouchingHeight = 1;


class State {
public:

tomdalling

require 'cell'

class AppCell < Cell::ViewModel
  include ::Cell::Erb

  def show
    render
  end

  def template_options_for(*args)

tomdalling

# params usually come in as strings, regardless of the actual type they are
params = {
  'fruit' => 'banana',
  'harvested_at' => '2017-05-08T01:46:16+10:00',
  'unwanted_framework_crap' => 'DHH',
}

# you can declare what the types are _supposed_ to be with a schema
schema = RSchema.define {{
  fruit: _Symbol,

tomdalling

Using Ruby 2.4.1
Code being benchmarked: https://github.com/tomdalling/rschema/blob/62da91a8c6e9b4795affe6824e23f27e713a1214/benchmarks/input_validation.rb 

Warming up --------------------------------------
       RSchema 3.1.1     1.640k i/100ms
           (coerced)   673.000  i/100ms
   (built + coerced)   142.000  i/100ms
   ActiveModel 5.1.1   103.000  i/100ms
dry-validation 0.10.7
                       759.000  i/100ms

tomdalling

I like the idea of providing an RSpec shared example to test all these behaviours.

For the constructor, I would change "consider using keywords" to "should use keywords". Keywords should be the default, unless the order is really obvious.

Re: "Value construction options could be provided by keyword arguments." I would probably prefer value contruction options to be in separate class methods, instead of #new.

Re: caching. I would be hesitant to do this at the global level (e.g. stored in the class).

tomdalling

title	layout	date	snippet_source
Super Secret Methods	post	2017-07-16	code/super_secret_methods.rb

Here is a quirk of the Ruby language that I discovered a few weeks ago.

Method names can not contain a period character.

tomdalling

When I do puts method_name inside #respond_to_missing?, it outputs begin, so it looks like it's treating self as if it were a Range.

This is the RSpec output:

An error occurred while loading ./spec/value_semantics_spec.rb.
Failure/Error: first_letter = method_name[self]

SystemStackError:
  stack level too deep

tomdalling

Tom's Narrow Guide to Melbourne

Places I like, for RubyConf AU attendees.

Coffee + Brunch Spots

• Queen Victoria Markets
• Degraves St
• St Ali (South Melbourne, just outside the CBD. Must try the bottled iced lattes.)
• Auction Rooms (North Melbourne, just outside the CBD)

tomdalling

Running test/automated/zettel/hashtag_query.rb
Zettel::HashtagQuery
  matches the presence of a hashtag
    with syntax: #a
  provides logical NOT
    with syntax: NOT #a
    with syntax: not #a
    with syntax: !#a
  provides logical AND
    with syntax: #a AND #b