proc and lambda

[Sourav]

What is the difference between proc function and lambda function when
they both create new Proc object? Is there any guidelines for
preferring one over another?

 

[Sourav]

Provided of course, I know the differences between Proc.new and lambda
~ both proc and lambda seems to behave the way, whereas, Proc.new
behaves slightly differently.

 

[ts]

S> Provided of course, I know the differences between Proc.new and lambda
S> ~ both proc and lambda seems to behave the way, whereas, Proc.new
S> behaves slightly differently.

Well, if you think that proc and lambda behave the same, you'll have a
surprise one day

moulon% ./ruby -ve 'proc { break }.call'
ruby 1.9.0 (2006-09-21) [i686-linux]
-e:1: break from proc-closure (LocalJumpError)
from -e:1:in `Proc#call'
from -e:1
moulon%

moulon% ./ruby -ve 'lambda { break }.call'
ruby 1.9.0 (2006-09-21) [i686-linux]
moulon%



Guy Decoux

 

[ts]

R> 1.8 Proc.new != proc, proc == lambda
R> 1.9 Proc.new == proc, proc!=lambda

yes,


Guy Decoux