我有一个.pl文件,包含一个非结构化的头文件和一些特定的X Y Z结构.标题没有“.”在那里.您可以在下面找到此文件的片段：
Header (in total 29 lines) ILINE VRTX 1 545057.78564453125 3800905.201171875 -15000 VRTX 2 545184.49072265625 3800765.451171875 -15000 VRTX 3 545310.91650390625 3800625.970703125 -15000 SEG 1 2 SEG 2 3 ILINE VRTX 136 551295.84606933594 3799015.443359375 -15000 VRTX 137 551293.82849121094 3798841.880859375 -15000 VRTX 138 551290.57849121094 3798661.892578125 -15000 SEG 136 137 SEG 137 138
我想要实现的是将我的X和Y值的小数点移到左边,如下所示：
VRTX 1 5450.5778564453125 38009.05201171875 -15000 VRTX 2 5451.8449072265625 38007.65451171875 -15000 VRTX 3 5453.1091650390625 38006.25970703125 -15000
我认为正则表达式可能会有所帮助,但我没有使用Python和Shell的经验.任何帮助表示赞赏.
解决方法
由于问题上有vim标签：
/\. qaqqanx2hi!<esc>@aq @a :%s/!/./g
假设没有！在文本中,否则你必须用不同的字符替换它.当然在vim中还有其他解决方案,但这是我现在能想到的最简单的解决方案.
分解：
/\. " searches every `.` in the file
" (and "marks" them as searchresults)
qaqqanx2hi!<esc>@aq " Our macro we use:
qaq " records an empty macro into register a
" (This ensures the register is empty)
qa " This starts recording a macro into register a again
nx2hi!<esc> " `n` jumps to the next search result," `2hxhi!<esc>` inserts a `!` 2 chars left of where
" the `.` has been,and exits insert mode
@a " calls the macro at register `a`,since we emptied it," nothing happens yet,but once we save this macro it will
" be in register `a`. So it will call itself until it
" reaches an abort conditions (no more `.` found in the
" text,thats why we replace `.` with `!` here,else
" the macro would move the `.` over and over to the left
q " Stops recording the macro and saves it (to register `a`)
@a " calls the macro in register `a`
:%s/!/./g " This just replaces all `!` in the file with `.`
可能更清洁的解决方案：使用Nowrapscan(感谢@Francesco)
/\. :set Nows qaqqax3hpn@aq @a :set ws
注意：宏稍微改变了顺序.我们必须先改变立场.然后跳转到下一个搜索出现,否则我们将错过第一次出现,因为搜索不再包围arof eof.
注意：最好先保存ws的状态然后恢复它.但这只适用于通用版本.
结论
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