Aha! Didn't realise try could take a block. Thanks!
On Thursday, 14 June 2012 at 1:04 PM, Ryan Bigg wrote:
> You can use Object#try from ActiveSupport to do this:
>
> "hello".try(:tap) { |a| puts "yielded #{a.inspect}" }
> nil.try(:tap) { |a| puts "yielded #{a.inspect}" }
>
> try will attempt a method, but only if it's called on an object that's not
> nil.
>
>
> On Thursday, 14 June 2012 at 11:01 AM, Steve H wrote:
>
> > I'm looking for something built-in to Ruby that works kind of like
> > Object#tap, but only yields if self is not nil.
> >
> > That is, can I do this without monkey-patching Object?
> >
> > If it's in Activesupport that's fine too. I feel like this method exists
> > but I can't find it.
> >
> > class Object
> > def tap_unless_nil
> > if nil?
> > nil
> > else
> > yield self
> > end
> > end
> > end
> >
> > "hello".tap_unless_nil{ |a| puts "yielded #{a.inspect}" }
> > nil.tap_unless_nil{ |a| puts "yielded #{a.inspect}" }
> >
> >
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