Perl去掉数组中重复的行

1.

#!/usr/bin/perl

use strict;

my %hash;
my @array = (1..10,5,20,2,3,4,5,5);
#grep 保存符合条件的元素
@array = grep { ++$hash{$_} < 2 } @array;

print join(" ",@array);
print "\n";

 

2.

 

#!/usr/bin/perl -w

use strict;

my %hash;
my @signer=`jarsigner -verify -verbose -certs Weibo.apk`;

@signer=grep {/X\.509/} @signer;
@signer=grep { ++$hash{$_} < 2 } @signer;

print "@signer";
#print join("\n",@signer);
#print "\n";

 

foreach my $a(@signer) {

my @b=split(/,/,$a);

print "$b[1]";
}

3.在数组中寻找唯一元素

 

#!/usr/bin/perl -w
use strict;

my @a=qw(a d f g h k a m l g);

my %hash=();

foreach (@a) {
$hash{$_}=1;
}
my @good=sort keys %hash;

print "value: @good\n";

4.寻找两个数组之间的交汇部分

#!/usr/bin/perl -w
use strict;
my @a=qw(a d f g h k m l g);
my @b=qw(l m d g k w z);
my %seen=();

foreach (@a) {
$seen{$_}=1;
}
my @c=sort grep($seen{$_},@b);
print "@c\n";

 

5.寻找两个数组之间不同部分

#!/usr/bin/perl -w
use strict;
my @a=qw(a d f g h k m l g);
my @b=qw(l m d g k w z);
my %seen=();

foreach (@a) {
$seen{$_}=1;
}
my @c=sort grep(!$seen{$_},@b);
print "@c\n";