From: goodieboy <goodieBoy@...>
Date: 2008-02-16T00:56:44+09:00
Subject: Re: recursive merge for hash

Thanks. But the only problem with that is, the overriding hash will
completely destroy *all* of the values in the original. So if I want
to just override one value, I get only one value. In this example,
"Sam" is lost:

first = {
  :data=>{
    :name=>{
      :first=>'Sam',
      :middle=>'I',
      :last=>'am'
    }
  }
}

second={
  :data=>{
    :name=>{
      :middle=>'you',
      :last=>'are'
    }
  }
}
all_new = first.merge(second)

puts all_new.inspect


On Feb 15, 10:47 am, "Farrel Lifson" <farrel.lif...@gmail.com> wrote:
> On 15/02/2008, goodieboy <goodie...@gmail.com> wrote:
>
> > Hi,
>
> >  Does anyone know of a good recursive merge method for Hashes? I'd like
> >  to be able to do something like:
>
> >  new_h = first.merge_r(second).merge_r(third)
>
> >  ... everything would be a copy, and hashes applied later in the
> >  sequence override the previous finally, returning a completely new
> >  hash... is there something out there like this?
>
> new_h = first.merge(second).merge(third)
>
> Farrel