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Feature #16817
openattr_predicate or attr_query or attr_something for ? methods
Status:
Open
Assignee:
-
Target version:
-
Description
I would like attr_predicate
like attr_reader etc.
attr_predicate :cat
would define a method named :cat?
that returned the value for ivar @cat
.
I would like this because i find myself writing this:
def cat?
@cat
end
which is fine once, but becomes tedious with many attributes
Another possibility is allowing attr_reader :cat?
to define a method that returns the value for ivar @cat
. currently it raises NameError (invalid attribute name
cat?')`
Thank you
Updated by sambostock (Sam Bostock) about 3 years ago
attr_predicate :cat
would define a method named:cat?
that returned the value for ivar@cat
.
I think it would make sense for the predicate method to convert the value to true
or false
before returning it, to make a clear distinction between a regular "getter" method, and a "predicate" method.
def cat?
!!@cat
end
Updated by hsbt (Hiroshi SHIBATA) almost 3 years ago
- Project changed from 14 to Ruby master
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