Skip to Main Content
Perl in a Nutshell, 2nd Edition
book

Perl in a Nutshell, 2nd Edition

by Nathan Patwardhan, Ellen Siever, Stephen Spainhour
June 2002
Beginner content levelBeginner
759 pages
80h 42m
English
O'Reilly Media, Inc.
Content preview from Perl in a Nutshell, 2nd Edition

Name

each

Synopsis

each %hash
                  

Returns a two-element list consisting of the key and value for the next element of a hash. With successive calls to each, you can iterate over the entire hash. Entries are returned in an indeterminate order. When the hash is entirely read, a null list is returned. The next call to each after that will start a new iteration. The iterator can be reset either by reading all the elements from the hash or by calling the keys function in scalar context. You must not add elements to the hash while iterating over it, although you are permitted to use delete. In a scalar context, each returns only the key.

There is a single iterator for each hash, shared by all each, keys, and values function calls in the program. This means that after a keys or values call, the next each call will start again from the beginning.

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Perl by Example, Fourth Edition

Perl by Example, Fourth Edition

Ellie Quigley
Perl Cookbook, 2nd Edition

Perl Cookbook, 2nd Edition

Tom Christiansen, Nathan Torkington
Perl in a Nutshell

Perl in a Nutshell

Nathan Patwardhan, Ellen Siever, Stephen Spainhour
Learning Perl, 7th Edition

Learning Perl, 7th Edition

Randal L. Schwartz, brian d foy, Tom Phoenix

Publisher Resources

ISBN: 0596002416Errata Page