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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

first

Synopsis

first { BLOCK } @list
                  

Evaluates a block of Perl code and sets $_ to each element of the list in turn. If BLOCK is true, first returns the first element. If BLOCK never returns true, or @ list has no items, then first returns undef. Note that first doesn’t necessarily return the first item in a list. Consider the following:

my @ll = qw(1 2 3);
my $fir = first { $_ > 1 } @ll;
print "$fir\n"; # Prints '2', since as 2 is the first item
                # in BLOCK that's > 1
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Publisher Resources

ISBN: 0596002416Errata Page