Debug

example.rb

# https://minhajuddin.com/2016/03/03/put-this-in-your-code-to-debug-anything
require 'rouge'
require 'method_source'
require 'pp'

class Dbg
  def initialize(object, to:)
    @object, @stream = object, to
  end

  def call
    stream.puts bannerize highlight object.pretty_inspect.chomp
  end

  def bannerize(text)
    color = rand 8
    "\e[3#{color}m>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\e[39m\n" +
    text.chomp + "\n" +
    "\e[3#{color}m<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\e[39m\n"
  end

  private

  attr_reader :object, :stream

  def highlight(raw_code)
    formatter = Rouge::Formatters::Terminal256.new theme: 'base16.solarized.dark'
    lexer     = Rouge::Lexers::Ruby.new
    tokens    = lexer.lex raw_code.chomp
    formatter.format(tokens)
  end
end

class BlockDbg < Dbg
  alias block object
  def to_proc
    Proc.new do |*arguments, &b|
      stream.puts bannerize highlight(formatted_locals + block.source)
      block.call(*arguments, &b)
    end
  end

  private def formatted_locals
    binding = block.binding
    locals  = binding.local_variables.map do |name|
      [name, binding.local_variable_get(name)]
    end
    width      = locals.map { |k, v| k.length }.max
    format_str = "%-#{width}s = %p\n"
    locals.map { |name, value| sprintf format_str, name, value }.join
  end
end

class Object
  def dbg(&block)
    block and return BlockDbg.new block, to: $stderr
    Dbg.new(self, to: $stderr).call
    self
  end
end

def self.get_csv
  [ {user_id: 100, name: 'Josh'},
    {user_id: 200, name: 'Jan' },
    {user_id: 300, name: 'Jill'},
  ]
end

row_id    = 200
id_column = :user_id
get_csv.dbg.find(&dbg { |row| row[id_column] == row_id }).dbg

ss.png