Tracing through a Ruby programEdit

Created 3/12/2007, updated 5/18/2017

In addition to using the debugger it can be useful to trace through a Ruby program or a section of it.

Example: tracing through one section

In this example we filter all but the "line" events (when a line changes):

require 'tracer'

t = Tracer.new
t.add_filter lambda { |event, *rest| event == 'line' }
t.on do
  something_you_want_to_trace
end

Or more verbosely (no filtering):

require 'tracer'

t = Tracer.new
t.on do
  something_you_want_to_trace
end