What you're talking about is known as "symbolic references". It won't work on lexical ("my") variables; your @bar would have to be a package (aka "global") variable.

But while symbolic refs can be done, they are strongly discouraged. Instead, consider using a hash variable:

  my %h;

  @{$h{"bar"}} = qw( One Two Three );

  $foo = "bar";

  for ( @{ $h{$foo} } ) {
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