Also it's worth mentioning that code sample of yours won't do what you expect
-- tap always returns its caller, but your method will return the block value
for non-nil receivers.
The logic should be:
class Object
def tap_unless_nil
yield(self) unless nil?
self
end
end
Again, wouldn't endorse it, I'm just talkin' hypotheticals here :)
- Ben
On 14/06/2012, 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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