On Thu, Mar 3, 2011 at 6:31 PM, Jim Gibson <jimsgib...@gmail.com> wrote:
> On 3/3/11 Thu Mar 3, 2011 3:11 PM, "Jim Green"
> <student.northwest...@gmail.com> scribbled:
>
>> On Mar 3, 5:44 pm, shawnhco...@gmail.com (Shawn H Corey) wrote:
>>> On 11-03-03 05:40 PM, Jim Green wrote:
>>>
>>>> But is there a easier way of
>>>> doing this I might not be aware of?
>>>
>>> Given your brief description, no. The problem is that you can't output
>>> the first datum without reading the last, because the last may be the
>>> first thing that needs to be outputted.
>>
>> Hello, let me generalize this problem,
>> lets say I have a hash with 2 levels of keys,
>> I want to convert this hash to another hash but with the 2 levels of
>> keys reversed.. I hope there is a module or sth that can do it.
>
> That is a simple problem that doesn't need a module (although one may
> exist).
>
> Untested:
>
> my %oldhash = ( a => { b=>c, d=>e }, f => {g=>h, i=>j}, ... );
> my %newhash;
> for( my($key1,$val1) = each %oldhash ) {
> for( my($key2,$val2) = each %{$val1} ) {
> $newhash{$key2}->{$key1} = $val2;
> }
> }
Thanks Jim, this will definitely work. but changing order of keys is a
general problems and hopefull some module exists to do that.
Jim
>
>
>
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