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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

map

Synopsis

map {block} list
map expr, list
                  

Evaluates the block or exprfor each element of list (locally setting $_ to each element) and returns the list value composed of the results of each evaluation. It evaluates block or exprin a list context, so each element of listmay 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.

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Publisher Resources

ISBN: 0596002416Errata Page