start page | rating of books | rating of authors | reviews | copyrights

Perl in a Nutshell

Perl in a NutshellSearch this book
Previous: Reference: exec Chapter 5
Function Reference
Next: Reference: exit
 

exists

exists $
hash
{$
key
}

Returns true if the specified hash key exists, even if the corresponding value is undefined.


Previous: Reference: exec Perl in a Nutshell Next: Reference: exit
Reference: exec Book Index Reference: exit