用grep / egrep查找重复的单词

Question

我需要用grep / egrep找到重复的单词。该计划如下：

空格word1＆lt; 1个或更多个空格＆gt; word1＆lt; 2个或更多个空格＆gt; word2＆lt; 1个或更多个空格＆gt; word2空间

示例

hello world world yaaay yaaay abc

grep之后：＆＃34;世界世界yaaay yaaay＆＃34;

我尝试使用：egrep " (\w{1,}) {1,}\1 "

Answer 1

我可以使用awk：

来实现这个目标

echo "hello world world yaaay yaaay abc" | awk 'BEGIN{tmp=""; result=""} {for(x=1;x<=NF;x++){if($x==tmp){result = result " "  $x " " $x};tmp=$x}} END{print result}'

输出：

 world world yaaay yaaay

用字符串“hello world world yaaay yaaay wow aaa aaa abc”再测试一次：

echo "hello world world yaaay yaaay wow aaa aaa abc" | awk 'BEGIN{tmp=""; result=""} {for(x=1;x<=NF;x++){if($x==tmp){result = result " "  $x " " $x};tmp=$x}} END{print result}'

输出：

世界世界yaaay yaaay aaa aaa