How to get a reference to a block (when no explicit block parameteris used?)

[Kenneth McDonald]

In a function, I can find out if a block was given using block_given?,
but there's no way I can find to get hold of that block if it's there--
I can only yield to it, so far as I can tell. I know there has to be a
method somewhere to do this, could some kind soul enlighten me?

Many thanks,
Ken

 

[Jan Friedrich]

In a function, I can find out if a block was given using block_given?,
but there's no way I can find to get hold of that block if it's there--
I can only yield to it, so far as I can tell. I know there has to be a
method somewhere to do this, could some kind soul enlighten me?

Many thanks,
Ken

def my_meth param, &block
p block
end

Regards,
Jan Friedrich

 

[Pit Capitain]

Ken, you can use Proc.new

http://www.ruby-doc.org/core/classes/Proc.html#M001573

Regards,
Pit

 

[Kenneth McDonald]

Unfortunately, that produces a method that _requires_ a block--I want
one where the block is optional. But thanks for the feedback.

Ken

 

[James Coglan]

[Note: parts of this message were removed to make it a legal post.]

def my_meth param, &block
p block
end

The way I understood the question was as follows:

def my_method(arg)
if block_given?
yield(arg)
end
end

How to get a reference to the given block in this situation? This is
especially true if you use define_method, which cannot specify a block param
(at least not in 1.8). Any suggestions?

 

[Sebastian Hungerecker]

Unfortunately, that produces a method that _requires_ a block

No, it does not.

HTH,
Sebastian Hungerecker
=2D-=20
NP: Die =C4rzte - Mondo Bondage
Jabber: (e-mail address removed)
ICQ: 205544826

 

[Yossef Mendelssohn]

Unfortunately, that produces a method that _requires_ a block--I want
one where the block is optional. But thanks for the feedback.

Did you try it?
nil

 

[Kenneth McDonald]

Whoops, apologies to all. Didn't realize &b arguments were optional.

K