Un-Answered Questions { CGI Perl }

If EXPR is an arbitrary expression, what is the difference between $Foo::{EXPR} and *{"Foo::".EXPR}?

516


Perl uses single or double quotes to surround a zero or more characters. Are the single(' ') or double quotes (" ") identical?

529


What does `$result = f() .. g()' really return?

572


What does `new $cur->{LINK}' do? (Assume the current package has no new() function of its own.)

546


What happens to objects lost in "unreachable" memory, such as the object returned by Ob->new() in `{ my $ap; $ap = [ Ob->new(), $ap ]; }' ?

551


What's the difference between /^Foo/s and /^Foo/?

553


When would `local $_' in a function ruin your day?

544


Why aren't Perl's patterns regular expressions?

595


Why is it hard to call this function: sub y { "because" } ?

539


How do I replace every character in a file with a comma?

533


Which of these is a difference between Perl and C++ ?

570


How do I sort a hash by the hash value?

558


How do I sort a hash by the hash key?

572


How many ways can we express string in Perl?

540


How to read file into hash array ?

574