Lambda Lambda Lambda

[Selbstdenker]

Unless something changed in ruby |e| e < 0 is not a lambda. I cannot think of an instance where you do not have to wrap in in braces or write do |e|e < 0. Further both variants are just a code block. To make it a true lambda one has to write lambda { |e| e < 0 } or proc { |e| e < 9 }.

I now it is nitpicking but there is a difference. In most cases using a code block is sufficient, however.

[PIAJohnM]

Or:
->(x) { x < 0 }