sugamasao

Person = Struct.new(:name, :age, :hoge, keyword_init: true) do
  def initialize(**kw)
    raise 'hoge は指定できへんで' if kw[:hoge]
    super
    self.hoge = :xxx
    undef :hoge=
  end
end

person = Person.new(name: 'foo', age: 10)

sugamasao

require 'drb/drb'
require 'logger'
require_relative './user'

URL = 'druby://localhost:8787'

server = DRbObject.new_with_uri(URL)
logger = Logger.new(STDOUT)
3.times do
  logger.info "call server"

sugamasao

require 'benchmark/ips'

TIME = 10_00
STR = "ruby"

puts RUBY_VERSION

Benchmark.ips do |bm|
  bm.report "gsub" do
    TIME.times do

sugamasao

• https://rubykaigi.org/2020-takeout/speakers
• https://rubykaigi.org/2020-takeout/schedule

今後のRubyについて聞きたい枠

• 9/4 10:15 Guild Implementation
  • 現Ractorについて
• 9/4 10:45 Type Profiler: a Progress Report of a Ruby 3 Type Analyzer
• 9/4 13:30 Don't Wait For Me! Scalable Concurrency for Ruby 3!
• 9/4 14:00 Ruby3 Typing, 2020

sugamasao

Person = Struct.new(:name, :age, keyword_init: true) do
  def greet
    puts "#{name} : #{age}"
  end
end

person = Person.new(name: 'taro', age: 20)
person.greet #=> taro : 20

sugamasao

mail(param) do |format|
  format.html { render 'user_mailer/welcome' } unless @text_dake_okuritai
  format.text { render 'user_mailer/text/welcome' } # path/to/name
end

sugamasao

[alias]
  browse = !"f() { open $(git remote get-url origin)/tree/$(git rev-parse HEAD)/${1}#L${2}; }; f"

sugamasao

def bar(h, **kwargs)
  p h, kwargs
end

# warning
bar(k: 42)
bar({k: 42}, {k2: 10})

# ok
bar({k: 42})

sugamasao

class Foo
  attr_reader :bar
  def initialize(bar)
    @bar = bar
  end

  def hoge
    puts "bar is #{bar}"
  end
end

sugamasao

package main

import (
	"fmt"
	"io/ioutil"
)

const script = `
#!ruby
puts "Hello, Ruby! VERSION = #{RUBY_VERSION}"