Question

I’m trying to create a database .Each element in list contains details in the form of associative array and the last element of each of these associative array is a 2-d array,i need help initializing it ..

Answer 1

You need to say much more about what it is you are trying to do, but this may help: it initialises a Perl data structure in the way you have described. Note that there can be no “last” element of a hash (a better name than “associative array”) as hashes are unordered. I have used the customers field of the data to hold the 2D array you talked about.

use strict;
use warnings;

my @list = (
  {
    id => 1,
    name => 'cattle',
    customers => [
      [ 'World Bank', 'Space Marines', 'Undersea Exploration' ],
      [ 1, 2, 3 ],
      [ 0.0500, 0.6322, 0.9930 ],
    ],
  },
  {
    id => 2,
    name => 'arable',
    customers => [
      [ 'Jack Spratt', 'Molly Malone', 'The Whistler' ],
      [ 4, 5, 6 ],
      [ 0.0022, 0.1130, 0.6930 ],
    ],
  },
  {
    id => 3,
    name => 'seafood',
    customers => [
      [ 'Tai Chi School of Fishery', 'Latin Intermediary College', 'Ping Pong Gymnastics' ],
      [ 7, 8, 9 ],
      [ 0.0012, 0.8540, 0.9817 ],
    ],      
  },
);