Question

I am trying to handle a simple case where i could be getting an object, or a dictionary. So i am either going to get a object like:

obj.fields.nick

or its going to be a dictionary like

obj['nick']

I was wondering if there was a simpler way to do the following:

value = (eval("obj.fields." + field[1]) if obj?.fields ) ? eval("obj['#{field[1]}']")

I was hoping to do something like:

value = (obj?.fields?."#{field[1]}" ) ? eval("obj['#{field[1]}']")  

But if that worked I wouldn’t be writing this post…

I am basically looking for a way to execute a string as part of the if

Answer 1

value = obj.fields?[field] ? obj[field]
# or
value = (obj.fields ? obj)[field]

This is the same as

if obj.fields?
    obj.fields[field]
else
    obj[field]

There is absolutely no need for eval.