perl脚本删除下一行重复的单词

Question

输入：

DFF_2 : dff_0_2 port map(READY_c => READY_c, CT0 =>CT0);
\DFF_0\ : dff_0 port map(un1_CT1 => un1_CT1, CT2 =>CT2);
DFF_10 : dff_0_10 port map(MRVQN1 => MRVQN1, un1_CT2_1 =>GSMC_un1_CT2_1);
DFF_1 : dff_0_1 port map(un1_CT2_1 =>GSMC_un1_CT2_1);
DFF_1 : dff_0_1 port map(un1_CT2_1 =>un1_CT2_1);

预期输出1：

DFF_2 : dff_0_2 port map(READY_c => READY_c, CT0 =>CT0);
\DFF_0\ : dff_0 port map(un1_CT1 => un1_CT1, CT2 =>CT2);
DFF_10 : dff_0_10 port map(MRVQN1 => MRVQN1, un1_CT2_1 =>GSMC_un1_CT2_1);
DFF_1 : dff_0_1 port map(un1_CT2_1 =>un1_CT2_1);

预期输出2：（无需按顺序排列，但应恢复更新行）

DFF_1 : dff_0_1 port map(un1_CT2_1 =>un1_CT2_1);    
DFF_10 : dff_0_10 port map(MRVQN1 => MRVQN1, un1_CT2_1 =>GSMC_un1_CT2_1);
\DFF_0\ : dff_0 port map(un1_CT1 => un1_CT1, CT2 =>CT2);    
DFF_2 : dff_0_2 port map(READY_c => READY_c, CT0 =>CT0);

对于这种情况，我不能使用重复行删除 perl 脚本，因为字符串 word8 已用新字符串 word10 更新。我试过将内容反转并应用带有重复单词的行 removed.but，我的代码无法实现它。

open (IN, "<input.txt") or die;
open (OUT, ">output.txt") or die;
my @reverse = reverse <IN>;
foreach (@reverse){
print OUT "@reverse\n"; }
close (IN);
close (OUT);  

output:

DFF_1 : dff_0_1 port map(un1_CT2_1 =>un1_CT2_1);    
DFF_1 : dff_0_1 port map(un1_CT2_1 =>GSMC_un1_CT2_1);
DFF_10 : dff_0_10 port map(MRVQN1 => MRVQN1, un1_CT2_1 =>GSMC_un1_CT2_1);
\DFF_0\ : dff_0 port map(un1_CT1 => un1_CT1, CT2 =>CT2);    
DFF_2 : dff_0_2 port map(READY_c => READY_c, CT0 =>CT0);




open (IN1, "<output.txt") or die;
open (OUT1, ">output1.txt") or die;
while (<IN1>){
my $save = "" if /(.+)\s\:/;
next if /$save\s/;
print OUT1 $_;}
close (IN1);
close (OUT1;

但它没有按预期生成输出文件。请帮助我。

Answer 1

试试这个正则表达式：

((line\d+)\s*:.*\n)

Live Demo on Regex101

工作原理：

(          # Capture line to be removed
  (line\d+)  # Capture Line Name / Number (Group #2)
  \s*        # Optional Whitespace
  :          # : (Colon)
  .*         # Line Data
  \n         # Newline Character at end of Line
)
           # Next line starts with this Line Name (stored in Group #2)

Answer 2

使用散列来做。

虽然迭代循环尝试使用 : 拆分行，因此使用模式匹配拆分行 ^.+?\K\s:

^为比赛开始

+? 有助于避免 +.

的贪婪

\K 防止单词分裂。

然后将这两个数据存入$first和$second。通过 $first 值创建哈希键。它有助于删除重复项。最后将 uniq 值存储到 %hash 中，然后使用 grep.

格式化散列

open my $fh,"<","one.txt";
my %hash;
while (<$fh>)
{   
    ($first,$second) = split(/^.+?\K\s:/);
    $hash{$first} = " : $second";

}

my @ar = grep{ $_ =$_.$hash{$_} }keys %hash;
print @ar;

perl脚本删除下一行重复的单词

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