Debugging on Codrut Constantin Gusoi

Emacs Lisp interactive debugging

Mon, 10 May 2021 11:05:44 +0000

Navigate to your function.
Instrument it with C-u M-x eval-defun, or C-u , e f in Spacemacs.
Execute that function.

Debug with these shortcuts:

Key	Action
`s`	Next sexp.
`i`	Step in.
`o`	Step out.
`d`	Backtrace.
`Q`	Quit.

Once you’re done, re-evaluate all functions (without C-u), or simply restart.

Firefox remote debugging

Sat, 24 Apr 2021 12:32:59 +0000

If you haven’t done already, then Enable ‘Developer options’ on your phone.
Enable Remote debugging via USB in your mobile browser’s settings.
Make sure your devices are properly connected via USB.
Visit about:debugging in your laptop browser.
Press Connect next to your device.
Select your device and press Inspect on your desired tab.

How to Use: pry-byebug

Sun, 12 Apr 2020 12:19:57 +0000

Add the pry-byebug gem, together with irb, to your Gemfile:

group :development, :test do
  gem 'irb'
  gem 'pry-byebug'
end

Add a .pryrc file to your project containing:

# frozen_string_literal: true

if defined?(PryByebug)
  Pry.commands.alias_command('c', 'continue')
  Pry.commands.alias_command('f', 'finish')
  Pry.commands.alias_command('n', 'next')
  Pry.commands.alias_command('s', 'step')
  Pry.commands.alias_command('w', 'whereami')

  Pry.commands.alias_command('q', '!!!')

  Pry::Commands.command(/^$/, 'repeat last command') do
    _pry_.run_command(Pry.history.to_a.last)
  end
end

Now you can start debugging your code:

require 'pry'
binding.pry