okuramasafumi

# frozen_string_literal: true

source "https://rubygems.org"

git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }

gem "rails"
gem "sqlite3"
gem "jbuilder"
gem "active_model_serializers"

okuramasafumi

アンチハラスメントポリシー

Grow.rb/Entaku.rb/Rubygemsコードリーディング部ではアンチハラスメントポリシーを定めています。

以下の内容について合意・遵守いただけない場合、イベントへの参加をお断りする・イベントからの退出をお願いする場合がございますので予めご了承ください。

当ポリシーの目的

当ポリシーは参加者の皆さんにイベントを最大限に楽しんでいただくために策定されました。

okuramasafumi

class WithEffect
  def initialize
    @list = ["Foo", "Bar", 42, "Baz"]
  end

  def process_item(item)
    throw(:item_not_string, 42) unless item.is_a?(String)

    puts item
  end

okuramasafumi

module EachWithEffect
  DEFAULT = Object.new.freeze

  def each_with_effect(effect_handlers = {}, &block)
    effect = catch(:effect) do
      block.call(self.peek)
    end
    if effect
      handler = effect_handlers.find{ |k, v| k === effect }&.last || effect_handlers.fetch(DEFAULT)
      alternative = handler.call(effect) if handler

okuramasafumi

class Module
  def define_mixable_method(name:, calls:, main:)
    define_method(name) do |&block|
      method_candidates = calls.map {|name| method(name) }
      block.call(main, method_candidates).each do |m|
        m.call
      end
    end
  end
end

okuramasafumi

module Kernel
  def ice(key, value, on: Object)
    if on.instance_methods.include?(key.to_sym)
      prev = on.instance_method(key)
      on.define_method key do
        on.remove_method key
        on.define_method(key, prev)
        return value
      end
    else

okuramasafumi

MAPPING = {
  a: 1,
  b: 2,
  c: 3,
  d: 4,
  e: 5,
  f: 6,
}.freeze

def method1(key)

okuramasafumi

class Hash
  def transform(&block)
    new_hash = {}
    each_pair do |key, value|
      rtn = block.call(key, value)
      case rtn
      in nil | true then new_hash[key] = value
      in false then next
      in Array[[_, _], *]
        rtn.each do |k, v|

okuramasafumi

def self.included(base)
  base.instance_variable_set(:@count, 0) unless base.instance_variable_defined?(:@count)
  base.instance_variable_set(:@count, base.instance_variable_get(:@count) + 1)
  puts base.name if base.instance_variable_get(:@count) > 1
end

okuramasafumi

class MyStringScanner
  class ScanError < StandardError; end

  attr_reader :string, :captures
  attr_accessor :pos
  def initialize(string, _obsolete = false, fixed_anchor: false)
    @string = string
    @fixed_anchor = fixed_anchor
    @pos = 0
    @previous_pos = 0