in reply to Expanding / flattening a structure

20050824 => {
        to  => 'new york',
        to  => 'london',
      },

[download]
You cannot have a hash that has the same key twice.


holli, /regexed monk/

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Re^2: Expanding / flattening a structure
by jaa (Friar) on Aug 24, 2006 at 18:36 UTC
    Apologies, you are right, here is a better example of the input: 
    my $struct = {
    fruit  => [qw( apple pear )],
    type    => [qw( farmed organic )],
    period  => {
      20050824 => {
        to  => ['new york', 'london', ],
      },
      20050825 => {
        to  => ['auckland', ],
      },
    }
  };

    [download]
    update: fixed first date [ -> {
[reply]
[d/l]
      Maybe:
      # example structure
my $struct = {
    fruit  => [qw( apple pear )],
    type    => [qw( farmed organic )],
    period  => {
      20050824 => [
        to  => ['new york', 'london' ],
        ],
      20050825 => [
        to  => ['auckland' ],
      ],

    },
  };

      [download]
      Would be syntactically valid?

      But given the only attribute to the date is to, why not remove that layer?

      jdtoronto

[reply]
[d/l]
        two reasons for the 'to':

        1) the token 'to' names the values in the result,

        e.g. I end up with this in the expanded array of hashes: 

          to => 'auckland',

        [download]

        2) also, this is just an example, in reality there are more values, e.g. 

          period => {
    20050824 => {
      to        => [ 'auckland', 'new york', ],
      transport => [ 'air', ]
    },
  },

        [download]
[reply]
[d/l]
[select]
[reply]
        I think that $struct is already reasonable efficient? Did you have a recommendation for a better way to structure it?
[reply]

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