zachjamesgreen · March 10, 2016 03:18 · Mar 4, 2016 · Mar 4, 2016
diff --git a/ss.png b/ss.png
diff --git a/example.rb b/example.rb
@@ -0,0 +1,71 @@
+# 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
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