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  1. or download this
    $ cat tst_del.pl
use v5.14;
...

This is perl 5, version 38, subversion 2 (v5.38.2)
  2. or download this
        If any part of LIST is an array, "foreach" will get very confused 
+if you
    add or remove elements within the loop body, for example with "spl
+ice".
    So don't do that.