I eagerly await the "defined" and "defined-or" operator of Perl 5.10 
$val = expr1 // expr2;
$val //= expr3;

[download]
This will fix many conditional assignment bugs involving checks on zero.
print+qq(\L@{[ref\&@]}@{['@'x7^'!#2/"!4']});

In reply to Re: When is 'eval' too inefficient? by codeacrobat
in thread When is 'eval' too inefficient? by argv

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