Stats

  • Locked Locked
  • Replies 7
  • Subscribers 143
  • Views 15072
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Equality of dbObjects

tweeks

Are dbobjects ever equal?

I did a test, creating two labels that are exact copies of eachother: same lpp, same xy, etc. Watch what happens:

> forall(prop label1->? get(label1 prop) == get(label2 prop))
 t
> label1 == label2 
 nil 


Looks like equality is not implemented for labels?
Parents

  • Hi Tom,

    But if 'equal()' or '==' changed it would break things all over - Derek is correct, you have two unique db id's that may happen to have the same values for all of the attributes, but any one of these could change and the other label object would remain unaltered.  Your 'forall' test for equality should meet your needs, or some other custom check.  Perhaps a better approach would be to have a SKILL++ method that changed the comparison applied based on the data being passed in, then the same function could be used for all different sorts of data.

    Hopefully this helps?

    Regards,

    Lawrence.

Reply

  • Hi Tom,

    But if 'equal()' or '==' changed it would break things all over - Derek is correct, you have two unique db id's that may happen to have the same values for all of the attributes, but any one of these could change and the other label object would remain unaltered.  Your 'forall' test for equality should meet your needs, or some other custom check.  Perhaps a better approach would be to have a SKILL++ method that changed the comparison applied based on the data being passed in, then the same function could be used for all different sorts of data.

    Hopefully this helps?

    Regards,

    Lawrence.

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.