home | O'Reilly's CD bookshelfs | FreeBSD | Linux | Cisco | Cisco Exam  


map

map {
block
} 
list

map 
expr
, 
list

Evaluates the block or expr for each element of list (locally setting $_ to each element) and returns the list value composed of the results of each such evaluation. It evaluates block or expr in a list context, so each element of list may produce zero, one, or more elements in the returned value. These are all flattened into one list. For instance:

@words = map { split ' ' } @lines;
splits a list of lines into a list of words. Often, though, there is a one-to-one mapping between input values and output values:
@chars = map chr, @nums;
This statement translates a list of numbers to the corresponding characters.


Previous: Reference: lstat Perl in a Nutshell Next: Reference: mkdir
Reference: lstat Book Index Reference: mkdir

Library Navigation Links

Copyright © 2001 O'Reilly & Associates. All rights reserved.