From: pjb@... (Pascal J. Bourguignon)
Date: 2009-02-16T21:30:03+09:00
Subject: Re: Hash :: Recursive traversing and stripping the values

vimal <cool.vimalsmail@gmail.com> writes:

> Hi,
>     I am a Ruby Newbie.
>
>     I wrote a function for stripping all the values(a recursive one if
> it is a nested hash) but i almost end up in an
>     error suggesting "Error => in `strip_hash_values': stack level too
> deep (SystemStackError)".
>     Can someone help me with this.

Perhaps a circular data structure is the problem:

irb(main):001:0> h = Hash.new
{}
irb(main):002:0> h[:ha]=Hash.new
{}
irb(main):003:0> h[:ha][:ho]=h
{:ha=>{:ho=>{...}}}
irb(main):004:0> h
{:ha=>{:ho=>{...}}}
irb(main):005:0> h[:ha][:ho][:ha]
{:ho=>{:ha=>{...}}}
irb(main):006:0> h[:ha][:ho][:ha][:ho]
{:ha=>{:ho=>{...}}}
irb(main):007:0> 


-- 
__Pascal Bourguignon__