Dot operator

Ruby
1

I am trying to use a dynamic method after the dot operator, its not
identifying. Please help me in resolving this is an urgent issue.

@opt1 has already a method which is same as the def_name assigned value

def_name = field_details[0].downcase.tr(’-’, ‘’)
@opt1.def_name = details[‘fieldvalue’]

Please help…

Thanks,
Sai

2

I’m not sure whether I understand your question correctly. Let’s do an
example: Assuming that def_name evaluates to the String ‘foo’, is it
correct that @opt1 understands a

@opt1.foo = …

? In this case, you can do it like this:

@opt1.send_public((def_name+’=’).to_sym, details[‘fieldvalue’])

Ronald

3

I have no real idea what you are trying to do here but:

def_name = field_details[0].downcase.tr(’-’, ‘’)
@opt1.def_name = details[‘fieldvalue’]

Do you try to dynamically call a method? In this case
you could try to use .send().

I do not understand why you show only two lines of
code. Errors could be elsewhere in your code.

Always try to showcase the smallest part of where
the problem is AND the specific error too.

4

Just a notice (because I can’t edit my earlier posting anymore):

The method you need to invoke is ‘public_send’, not ‘send_public’, as I
wrote. Sorry for the confusing typo.

Ronald

5

@Robert: I admit that the OPs question is a bit unclear, but I assume
that he wants to invoke a setter method where he has the name of the
corresponding getter method as a string.

I would recommend against using Object#send, as you suggested, but use
Object#public_send instead. It’s safer.

Ooops, I see that in my own response, I misspelled the method name. Will
fix it.

6

Thanks a lot guys figured out a way

screen.method(method_name).call(field_value)

This has worked

7

Sai Charan wrote in post #1185750:

I am trying to use a dynamic method after the dot operator, its not
identifying. Please help me in resolving this is an urgent issue.

@opt1 has already a method which is same as the def_name assigned value

def_name = field_details[0].downcase.tr(‘-’, ‘’)
@opt1.def_name = details[‘fieldvalue’]

Please help…

Thanks,
Sai

I’m not trying to be sarcastic, just passing along a very useful tool.

I usually just put Ruby,
Class, Datatype" into Google and the appropriate rubydoc pops up

This is very handy.