日志
今天写的两个实用小程序
| |
#! /usr/bin/perl
use warnings;
use strict;
use Data::Dumper;
#print "please enter a file name: \n";
#chomp (my $file = <>);
while (@ARGV) {
my $file = shift;
open (RFILE, $file) || die "can't open $file: $!";
my @data = <RFILE>;
close (RFILE);
my %words_list = ();
foreach my $line (@data) {
while ($line =~ s/\b(\w+)\b//) {
if (exists $words_list{$1}) {
$words_list{$1}++;
}
else {
$words_list{$1} = 1;
}
}
}
print Dumper(\%words_list);
}
2. 修改一个文件，并自动生成后缀名为.bak原文件的备份文件
#! /usr/bin/perl
use warnings;
use strict;
$^I = ".bak";
while (<>) {
s/^professor/student/;
print;
}
/2 
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