ЭЛЕКТРОННАЯ БИБЛИОТЕКА КОАПП |
Сборники Художественной, Технической, Справочной, Английской, Нормативной, Исторической, и др. литературы. |
3.2.121 refref The ref operator returns a true value if REF SCALAR ARRAY HASH CODE GLOB If the referenced object has been blessed into a package, then that package name is returned instead. You can think of ref as a "typeof" operator. if (ref($r) eq "HASH") { print "r is a reference to a hash.\n"; } elsif (ref($r) eq "Hump") { print "r is a reference to a Hump object.\n"; } elsif (not ref $r) { print "r is not a reference at all.\n"; } See Chapter 4 for more details. |