Coscup 2020 Ruby Byebug

coupon.rb

def get_coupon(user_id, history)
  if history[user_id] = true
    return 0
  end
  history[user_id] = true
  3000
end

puts get_coupon(1, {})

framework

#!/usr/bin/env ruby
require_relative 'my_code.rb'

puts eval("my"+"_"+"method")

Gemfile

# frozen_string_literal: true

source "https://rubygems.org"

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

# gem "rails"
gem 'byebug'

hidden_lib.rb

class HiddenLib
  def method_missing(name, *args)
    "called #{name} with args: #{args.map(&:to_s)}"
  end
end

info.md

投影片網址： https://speakerdeck.com/johnlinvc/ru-he-shi-yong-byebug-lai-chu-cuo-ruby-cheng-shi

method_caller.rb

require_relative 'hidden_lib.rb'

puts HiddenLib.new.hello("world")

my_code.rb

require 'byebug'
def my_method
  byebug
  "hello"
end