How to debug Ruby scripts

ruby debugging
Andrew Grimm picture Andrew Grimm · Oct 18, 2010 · Viewed 164.1k times · Source

I copied the following Ruby code from the Internet and made a few changes but it doesn't work.

What can I do to debug the program by myself?

Answer

horseyguy picture horseyguy · Nov 3, 2011

Use Pry (GitHub).

Install via:

$ gem install pry
$ pry

Then add:

require 'pry'; binding.pry

into your program.

As of pry 0.12.2 however, there are no navigation commands such as next, break, etc. Some other gems additionally provide this, see for example pry-byedebug.

Related questions

Write to rails console

When I want to try or debug smthing I run rails console and do some stuff there. I can print some text or variables from code by raising exception with raise "blablabla". Question: How I can just write to rails …

Read More
How do you debug a Sinatra app like a Rails app?

In my main Sinatra controller, I want to debug the params hash after it is POSTed from a form. I have added: puts params.inspect and set :logging, :true The params.inspect works if everything goes well. But if an …

Read More
Debugging in ruby 1.9

What do you guys use for debugging in ruby 1.9? rdebug doesn't seem to be compatible.. is there anything out there?

Read More