Ruby trace instance variable

Question

How to check if instance variable value have changed?

For global variable there is a trace_var method http://apidock.com/ruby/Kernel/trace_var

But I didn't found any information how to do that with instance variables(or class one).

I didn't use Rails.

Ruby 1.9.2.

Do you mean from inside the debugger, or in general?

tadman
– tadman

2011-10-20 22:39:29 +00:00
Commented Oct 20, 2011 at 22:39 — tadman
– tadman, Commented Oct 20, 2011 at 22:39

tadman · Accepted Answer · 2011-10-20 22:41:11Z

3

The best approach might be to avoid accessing and manipulating the instance variable directly and instead go through an attr_accessor style interface.

This gives you the ability to do things like this:

def my_attr=(value)
  logger.debug("my_attr changed to #{value.inspect}")
  @my_attr = value
end

answered Oct 20, 2011 at 22:41

tadman

212k23 gold badges237 silver badges266 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Ruby trace instance variable

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related