You could do
my $iter = get_value_iter($oWkBook);
while ($iter->(my $item_ref)) {
$$item_ref =~ s/^\s+\n$//;
}
if you defined get_value_iter as follows:
sub get_value_iter {
our $val; local *val = \$_[0];
if (ref($val) eq 'SCALAR') {
my $ref = $val;
return sub {
my $sub_iter = get_value_iter($$ref);
return $sub_iter->($_[0]);
};
}
if (ref($val) eq 'ARRAY') {
my $ref = $val;
my $key = 0;
my $sub_iter;
return sub {
for (;;) {
return 1 if $sub_iter && $sub_iter->($_[0]);
return if $key >= @$ref;
$sub_iter = get_value_iter($ref->[$key++]);
}
};
}
if (ref($val) eq 'HASH') {
my $ref = $val;
my @keys = keys %$ref;
my $sub_iter;
return sub {
for (;;) {
return 1 if $sub_iter && $sub_iter->($_[0]);
return if not @keys;
$sub_iter = get_value_iter($ref->{shift @keys});
}
};
}
{
my $ref = \$val;
my $done = 0;
return sub {
return if $done;
$_[0] = $ref;
$done = 1;
return 1;
};
}
}
Scalar::Util's reftype can be used instead of ref if you wish to traverse objects.
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