我已经编写了一个小 Perl 脚本,用于这种事情。它可以做的不仅仅是你要求的,但它也可以做你需要的:
#!/usr/bin/env perl -w
use strict;
use Getopt::Std;
my %opts;
getopts('hvfcmdk:', \%opts);
my $missing=$opts{m}||undef;
my $column=$opts{k}||undef;
my $common=$opts{c}||undef;
my $verbose=$opts{v}||undef;
my $fast=$opts{f}||undef;
my $dupes=$opts{d}||undef;
$missing=1 unless $common || $dupes;;
&usage() unless $ARGV[1];
&usage() if $opts{h};
my (%found,%k,%fields);
if ($column) {
die("The -k option only works in fast (-f) mode\n") unless $fast;
$column--; ## So I don't need to count from 0
}
open(my $F1,"$ARGV[0]")||die("Cannot open $ARGV[0]: $!\n");
while(<$F1>){
chomp;
if ($fast){
my @aa=split(/\s+/,$_);
$k{$aa[0]}++;
$found{$aa[0]}++;
}
else {
$k{$_}++;
$found{$_}++;
}
}
close($F1);
my $n=0;
open(F2,"$ARGV[1]")||die("Cannot open $ARGV[1]: $!\n");
my $size=0;
if($verbose){
while(<F2>){
$size++;
}
}
close(F2);
open(F2,"$ARGV[1]")||die("Cannot open $ARGV[1]: $!\n");
while(<F2>){
next if /^\s+$/;
$n++;
chomp;
print STDERR "." if $verbose && $n % 10==0;
print STDERR "[$n of $size lines]\n" if $verbose && $n % 800==0;
if($fast){
my @aa=split(/\s+/,$_);
$k{$aa[0]}++ if defined($k{$aa[0]});
$fields{$aa[0]}=\@aa if $column;
}
else{
my @keys=keys(%k);
foreach my $key(keys(%found)){
if (/\Q$key/){
$k{$key}++ ;
$found{$key}=undef unless $dupes;
}
}
}
}
close(F2);
print STDERR "[$n of $size lines]\n" if $verbose;
if ($column) {
$missing && do map{my @aa=@{$fields{$_}}; print "$aa[$column]\n" unless $k{$_}>1}keys(%k);
$common && do map{my @aa=@{$fields{$_}}; print "$aa[$column]\n" if $k{$_}>1}keys(%k);
$dupes && do map{my @aa=@{$fields{$_}}; print "$aa[$column]\n" if $k{$_}>2}keys(%k);
}
else {
$missing && do map{print "$_\n" unless $k{$_}>1}keys(%k);
$common && do map{print "$_\n" if $k{$_}>1}keys(%k);
$dupes && do map{print "$_\n" if $k{$_}>2}keys(%k);
}
sub usage{
print STDERR <<EndOfHelp;
USAGE: compare_lists.pl FILE1 FILE2
This script will compare FILE1 and FILE2, searching for the
contents of FILE1 in FILE2 (and NOT vice versa). FILE one must
be one search pattern per line, the search pattern need only be
contained within one of the lines of FILE2.
OPTIONS:
-c : Print patterns COMMON to both files
-f : Search only the first characters of each line of FILE2
for the search pattern given in FILE1
-d : Print duplicate entries
-m : Print patterns MISSING in FILE2 (default)
-h : Print this help and exit
EndOfHelp
exit(0);
}
在你的情况下,你会运行它
list_compare.pl -cf file1.txt file2.txt
该-f
选项使其仅比较 file2 的第一个单词(由空格定义)并大大加快速度。要比较整行,请删除-f
.