It looks like you want something like this:
$ perl -le'
use Data::Dumper;
my @bigarray = (
[ "123*jeff", "tortoise", "qwerty" ],
[ "456*john", "parrot", "azerty" ],
[ "789*jane", "budgie", "abcdef" ],
);
print Dumper \@bigarray;
@bigarray = map [ map split( /\*/ ), @$_ ], @bigarray;
print Dumper \@bigarray;
'
$VAR1 = [
[
'123*jeff',
'tortoise',
'qwerty'
],
[
'456*john',
'parrot',
'azerty'
],
[
'789*jane',
'budgie',
'abcdef'
]
];
$VAR1 = [
[
'123',
'jeff',
'tortoise',
'qwerty'
],
[
'456',
'john',
'parrot',
'azerty'
],
[
'789',
'jane',
'budgie',
'abcdef'
]
];
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