Mix debugger commands and ruby code evaluation

Question

I'm currently upgrading an old project from and old version of ruby(1.8.7)/rails(3.0) to 1.9.3/3.1 (as a stepping stone to newer versions).

I'm using gems debugger for 1.9.3 and ruby-debug for 1.8.7

When I run , I can run commands like info variables to get the list and values of all currently-scoped variables:

...
@current_phone = nil
@fields = {}
@global = {:source_type=>"pdf"}
@images = []
@index = {}
@lines = []
...

Also I can run arbitrary ruby code - a useful one I've been using is

File.open("/tmp/new_version", "w"){|f|f.write(@fields)}

which is useful for me to quickly compare between the old version and the new version using a file diff program.

Can I link these together so I can write to a file all the output of info variables? It would be sufficient if I could do

tempvar = info variables

or something along those lines, of course, but that gives

*** NameError Exception: undefined local variable or method `variables' for <ClassWhatever>

iced · Accepted Answer · 2015-03-06 20:10:45Z

1

instance_variables.map { |v| [v, instance_variable_get(v)] }

Not exactly hash map, but you'll be good with it.

answered Mar 6, 2015 at 19:52

iced

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2 Comments

Show just instance_variables output

Ahh yes, you got arrays in some of your variables. Will fix answer now.