I'm redoing old cryptic code and found this seemingly useful idiom for casting array refs back to arrays.

 
fit_data(\@array);
sub fit_data {
    my $refCopy=$_[0];
    *ydata=$refCopy;
    print "array contains: ",join(",",@ydata)," \n";
    print "last index is $#ydata \n";
}

[download]

but I can't find a way to get this to work under 'strict', even if we excuse the glob part.

As the following 3 versions illustrate, I've tried declaring my @ydata as a lexical, and as a global outside the routine (which I'd like to get away from), but they all have their drawbacks. Is there a way to do this cleanly within a subroutine, and still use strict for your uses of the array?

use strict;
my @valueArr = (1,2,3,4);

fit_data(\@valueArr);
fit_dataLex(\@valueArr);
fit_dataGlobal(\@valueArr);

sub fit_data {
    no strict "vars";
    my $refCopy=$_[0];
    *ydata=$refCopy;
    print "array contains: ",join(",",@ydata)," \n";
    print "last index is $#ydata \n";
    #but you can't use strict on @ydata references 
}

#if we define @ydata with my, it's not in the glob table, but strict i
+s happy.
sub fit_dataLex {
    use strict;
    my @ydata;
    
    my $refCopy=$_[0];
    *ydata=$refCopy;  #but @ydata not set
    print "array contains: ",join(",",@ydata)," \n";
    print "last index is $#ydata \n";
}

# if we create @ydata as global, we have to qualify it every time,
# and dirty our global space with 'local' vars.
@main::ydata = (); #to use a typeglob below, 
sub fit_dataGlobal {
    use strict;
    my $refCopy=$_[0];
    *ydata=$refCopy;
    print "array contains: ",join(",",@main::ydata)," \n";
    print "last index is $#main::ydata \n";}

[download]

In reply to aliasing arrays using typeglob under strict by RockyMtn

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