I’m a relative newbie. I’m finally getting the hang of some of the
syntactic sugar provided, such as the whole thing about using the “or”
operator to provide a default value if something is nil:
foo = bar || “emptiness”
One thing I keep running into over and over and over and over that I
wish there was some syntactic sugar for is the whole business of calling
a method on an object, and doing something intelligent if the object is
If I have a string of stuff like:
blah = foo.bar.split
what if bar is nil? There are obvious long hand ways to deal with this,
but then you loose the smoothness of lining up things like this in Ruby.
I guess what I want is some syntactic sugar that means “this object, or
an empty one of these if this is nil”, so that I would get an empty
result instead of a nil object missing method error.
I would like to be able to write:
blah = foo.bar||empty(bar).split
This could be written:
blah = foo.bar||"".split
But that requires a well known object type for bar. What if it is:
blah = foo.bar.whatchamacallit()
where bar is some oddball object of your own imagining.
Have you veteran Rubyists come up with a nice way to write stuff like
this that keeps the nice clean flow of Ruby’s chaining in place, but
solves the problems with potentially nil intermediate results?