如何在VI编辑器中获取当前行的长度？

Question

有没有办法检查光标当前在VI编辑器中的当前行的长度？我尝试在谷歌搜索，但我能找到的是如何使用“set nu”在当前打开的文件中查看行号。

Answer 1

您可以通过strwidth和getline获得当前行的长度。从:h getline

      *getline()* 
getline({lnum} [, {end}]) 
     Without {end} the result is a String, which is line {lnum} 
     from the current buffer. Example: > 
      getline(1) 
<  When {lnum} is a String that doesn't start with a 
     digit, line() is called to translate the String into a Number. 
     To get the line under the cursor: > 
      getline(".") 
<  When {lnum} is smaller than 1 or bigger than the number of 
     lines in the buffer, an empty string is returned. 

和:h strwidth：

strwidth({expr})     *strwidth()* 
     The result is a Number, which is the number of display cells 
     String {expr} occupies. A Tab character is counted as one 
     cell, alternatively use |strdisplaywidth()|. 
     When {expr} contains characters with East Asian Width Class 
     Ambiguous, this function's return value depends on 'ambiwidth'. 
     Also see |strlen()|, |strdisplaywidth()| and |strchars()|. 

把所有这些组合起来，你可以做

echo strwidth(getline('.')) 

呼应当前行的长度。当然，你也可以通过改变参数来获得特定行的长度。

echo strwidth(getline(3)) "Length of line 3 
echo strwidth(getline('$')) "Length of the last line 

Answer 2

写入电流线到一个外壳命令：

:.w !wc -c 

也要注意，使用wc -c的长度包括\n。当你不希望出现这种情况，一个。减去或使用类似

:.w !tr -d '\n'|wc -c