Question

I have a block of code and I’d like to test if the body is empty without running the code inside of the block. Is that possible?

Answer 1

The sourcify gem adds a Proc#to_source method:

>> require 'sourcify'
=> true
>> p = Proc.new {}
=> #<Proc:0x000001028490b0@(irb):3>
>> p.to_source
=> "proc { }"

Once you have the block as a string it’s fairly easy to see if there’s noting (or only whitespace) between the curly braces.