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<p><FONT class=normalfont><B><font color=blue>正则表达式</font></B></FONT><BR><FONT class=smallfont color=#ff9900>2004-04-23 15:18 pm</FONT><BR><FONT class=normalfont>作者：作者<br>来自：Linux知识宝库<br>联系方式：无名<br><br>:v/./$s/$/<ctrl-v><enter>./|'';/./-1j|$d<br>
Replaces multiple blank lines with just one blank line.<br>
<br>
大家看看，试着解释一下 <br>
<br>
我试了几次，都没有好用，命令的意思好像是把空行（不包括空格,TAB..行）删除掉，<br>
用g/^$/ d 应该就可以。<br>
<br>
:v/./$s/$/<ctrl-v><enter>./|'';/./-1j|$d<br>
可以分解为：<br>
1 :v/./$s/$/<ctrl-v><enter>./<br>
意思是把所有空行选出来并且到最后一行然后添加N个行，N为查找到的空行数<br>
2 | 命令的意思为循环执行<br>
3 '' 跳转到上一次位置<br>
4 ;/./ 查找到下一个非空行<br>
5 -1j 合并一行<br>
6 $d 把最后一行删除<br>
总之我感觉此条命令太复杂，而太复杂的东西最好使用VIM中的宏记录，记录操作后，再重复执行，应该比这个好明白。<br>
<br>
<br>
<br>
:v<br>
怎么使用?<br>
<br>
help :v如下：<br>
:[range]g[lobal]/{pattern}/[cmd]<br>
Execute the Ex command [cmd] (default ":p") on the<br>
lines within [range] where {pattern} matches.<br>
<br>
:[range]g[lobal]!/{pattern}/[cmd]<br>
Execute the Ex command [cmd] (default ":p") on the<br>
lines within [range] where {pattern} does NOT match.<br>
<br>
*:v* *:vglobal*<br>
:[range]v[global]/{pattern}/[cmd]<br>
Same as :g!.<br>
<br>
是的，要达与楼主同样效果，其实完全可以用简短得多的命令，<br>
<br>
:g/^$/,/./-j<br>
<br>
就行了。<br>
<br>
甚至，只要用<br>
<br>
cat -s <br>
<br>
就行了 <br>
<br>
我在 vi 下面试试，能成。在 vim 下面就不稳定，有时行有时不行。 <br>
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