i'm currently learning Ruby. So, while learning about code blocks and
yields i wanted to put my freshly acquired knowledge to the test and
(just to see if i understood correctly) write my own simple each method
for Arrays. so i did:
class Array
def each
for x in self
yield(x)
end
end
end
But running it gives me SystemStackError: stack level too deep. It works
fine when i rename it, so i guess it's just Ruby not appreciating my
fine work or somehow making sure i don't introduce flagrant overwrites
to built-in methods??? Anybody feels like enlightening me on how this
works? Thanks.
···
--
Posted via http://www.ruby-forum.com/.
If I'm not mistaken, the "for foo in bar" construct uses the each method. (It
basically gets translated to "bar.each do |foo|"
So, your method now looks like:
def each
self.each do |x|
yield(x)
end
end
This keeps recursing until ruby kills it due to the stack being too deep.
···
On Tuesday 07 March 2006 13:26, Sebastian Friedrich wrote:
i'm currently learning Ruby. So, while learning about code blocks and
yields i wanted to put my freshly acquired knowledge to the test and
(just to see if i understood correctly) write my own simple each method
for Arrays. so i did:
class Array
def each
for x in self
yield(x)
end
end
end
But running it gives me SystemStackError: stack level too deep. It works
fine when i rename it, so i guess it's just Ruby not appreciating my
fine work or somehow making sure i don't introduce flagrant overwrites
to built-in methods??? Anybody feels like enlightening me on how this
works? Thanks.
--
Brian Mattern