methods in eruby

[Florian Weber]

hi!

is there some way to make this work:

<% def foo %>
some stuff which should be displayed
<% end %>
..
<%= foo %>

?

thanks!

ciao!
florian

 

[Mark Hubbart]

hi!

is there some way to make this work:

<% def foo %>
some stuff which should be displayed
<% end %>
..
<%= foo %>

?

First problem: in your example, foo doesn't return a string. It would
try to print "some stuff which..." to whatever output is being used (on
a webserver, the socket). So using <%= tags aren't nessesary.

Second problem: because of the way that output is managed, the scope
inside foo() can't see the output handler. Therefore, you get an error.

Solution:

####### code:

-- define foo
<% foo = lambda do %>
some stuff which should be displayed
<% end %>
-- now, test foo:
<% foo.call %>
-- test foo again:
<% foo[] %>

####### output:

-- define foo

-- now, test foo:

some stuff which should be displayed

-- test foo again:

some stuff which should be displayed

thanks!

ciao!
florian

cheers,
Mark

 

[Alexey Verkhovsky]

<% foo = lambda do %>

Oh... I was wondering about the same question, thanks a lot for the
answer.

Isn't lambda a deprecated keyword, by the way? I remember reading
something like that on this list.

Brgds,
Alex

 

[Kent Sibilev]

No, it's proc keyword which is deprecated.

Cheers,
Kent.

 

[Mikael Brockman]

No, it's proc keyword which is deprecated.

To be utterly pedantic, proc and lambda aren't keywords: they're
regular method names.

 

[Mark Hubbart]

Kernel#proc is deprecated, because it is different from Proc.new, which
causes confusion. Kernel#proc is an alias (effectively, if not
actually) for Kernel#lambda. The exact differences have been discussed
elsewhere on the list.

To be utterly pedantic, proc and lambda aren't keywords: they're
regular method names.

cheers,
Mark