用perl按记录条件分割大文件

用perl按记录条件分割大文件

《intermediate perl》一书中第8章练习2是一个分割文件的练习

Gilligan: 1 coconut
Skipper: 3 coconuts
Gilligan: 1 banana
Ginger: 2 papayas
Professor: 3 coconuts
MaryAnn: 2 papayas
.......

要求按照：前的字符将原始文件分割成若干个*.info文件

可以有2种方法解决

1、

#!/usr/local/bin/perl
use strict;
use warnings;

use IO::File;
my %output_handles;
while (<>) {
unless (/^(S+):/) {
warn "ignoring the line with missing name: $_";
next;
}
my $name = lc $1;
my $handle = $output_handles{$name} ||=
my $fh =IO::File->new(">$name.info")|| die "Cannot create $name.info: $!";
#print "$. $fhn" ;
#print "$. $handlen" ;
print $handle $_;
}

2.

#!/usr/local/bin/perl
use strict;
use warnings;

use IO::File;
my %output_handles;
while (<>) {
unless (/^(S+):/) {
warn "ignoring the line with missing name: $_";
next;
}
my $name = lc $1;
# my $handle = $output_handles{$name} ||=
my $fh =IO::File->new(">>$name.info")|| die "Cannot create $name.info: $!";
#print "$. $fhn" ;
#print "$. $handlen" ;
print $fh $_;
}

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