I have certain classes that are implemented as decorators in my Rails app which is on Ruby 1.8.7 . I keep getting the warning - warning: already initialized constant ABC . Here ABC is the name of the constant.
To solve this, I'm using the const_defined? method as suggested in this answer .
My doubt is - is const_defined? the right way to check if a class constant is already defined in ruby ? I clearly see that it can be used to check for a module constant.
I was able to see that the defined? method can also be used as mentioned in this answer. I tried to lookup the documentation of defined?, but I don't see a link to its documentation based on my search thus far.
I'm not sure which to choose among the two as I can't see a clear difference between the two at this point.
Could one please suggest which is best to use in this situation and why?.
The keyword defined? is documented here.
It is better to ask if it is a constant, and use const_defined? if it is important that it is a constant. If you only care that it is defined, then use the keyword defined?