undefing @a would've cleared it, affecting one of the things that the symbol "b" also points to:
$ perl -le '@x = qw(1 2 3); $x = 1; *y = *x; undef @x; print "$y [@y]"
+'
1 []

[download]
but undefing *a clears the entries for "a" in the symbol table, without affecting the things that the symbol "b" also points to:
$ perl -le '@x = qw(1 2 3); $x = 1; *y = *x; undef *x; print "$y [@y]"
+'
1 [1 2 3]

[download]
[]s, HTH, Massa (κς,πμ,πλ)

In reply to Re^4: Tell me how it works! by massa
in thread Tell me how it works! by nagalenoj

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