Hi, I'm trying to iterate through a json decoded string (using JSON::PP's decode) in order to replace individual elements with corresponding perl objects (e.g. strings starting with ISODate with Time::Moment). i keep running into issues due to the structure of the json_decoded object. i'm new to per and traversing the structure to get to the parts i want to replace is a nightmare of hash/array referencing/dereferencing. here's what i have. could someone please point me to where i'm going wrong?

my $qstr = 'MONGOQUERY[
        {
            $match: {
                $or : [{"prefix" : "27450500"}, {"creationDate": ISODa
+te("2017-06-18T12:52:16.000")}]
            }
        },
        {
            $project: {
                _id:0,
                prefix:1
            }
        },
    ]';


$qstr=~s/MONGOQUERY//gs;
$qstr=~s/ISODate\("([^)]*?)\)/"ISODate$1/gs;


#Timestamp,ISODate, NumberDecimal,NumberLong,NumberInt,Symbol
my $qarrayref = JSON::PP->new->allow_nonref->relaxed->allow_barekey->l
+oose->decode($qstr);

my $rlimit=50;
repl_mongo(\@{$qarrayref},$rlimit);



sub repl_mongo{
 if($_[1]>0){
  open(my $fh, '>>', '/tmp/mongosample.txt');
    if(ref($_[0]) eq 'ARRAY'){
        foreach my $item(@{$_[0]}){
            repl_mongo($item,$_[1]-1 );
        }
    }elsif(ref($_[0]) eq 'HASH'){
        foreach my $item (keys %{$_[0]}){
            repl_mongo($key,$_[1]-1 );
        }
    }else{
            if(index("ISODate", $_[0]) >= 0){
                $_[0] =~s/ISODate//gs;
            #    $_[0] =Time::Moment->from_string($_[0]);
            }
    }
  close $fh;
 }
}

open(my $fh, '>>', '/tmp/mongosample.txt');
    print $fh Dumper($qarrayref);
close $fh;
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