“什么是”呢=&引用;在vim脚本中是什么意思?

“什么是”呢=&引用;在vim脚本中是什么意思?,vim,Vim,我经常看到以“let s.='something'”形式分配给变量的操作,下面是我一直在努力理解的vim脚本中的特定代码: let s .= '%' . i . 'T' let s .= (i == t ? '%1*' : '%2*') let s .= ' ' let s .= i . ':' let s .= winnr . '/' . tabpagewinnr(i,'$') let s .= ' %*' let s .= (i == t ? '%#TabLineSel#' : '%#Tab

我经常看到以“let s.='something'”形式分配给变量的操作,下面是我一直在努力理解的vim脚本中的特定代码:

let s .= '%' . i . 'T'
let s .= (i == t ? '%1*' : '%2*')
let s .= ' '
let s .= i . ':'
let s .= winnr . '/' . tabpagewinnr(i,'$')
let s .= ' %*'
let s .= (i == t ? '%#TabLineSel#' : '%#TabLine#')
代码将选项卡编号(
i
)和视口编号(
tabpagewinner(i,“$”
)的
winnr
)添加到选项卡名称中,使其看起来类似于“1:2/4缓冲区名称”。从外观上看,
=
操作似乎在向
s
添加内容。但是,我不明白前两行是做什么的。感谢您的帮助。

一次一个:


let s .= '%' . i . 'T'
假设i=9和s=“bleah”,s现在将是“bleah%9T”

这是C中熟悉的三元运算符。如果t==9,则s现在是“bleah%9T%1*”。如果t不是9,那么s现在是“bleah%9T%2*”

维姆是你的朋友:

(嗯,这有点难找到):


=
是字符串连接快捷运算符。基本上是
s=s。somethingelse

let s .= (i == t ? '%1*' : '%2*')
 :let {var} .= {expr1}    Like ":let {var} = {var} . {expr1}".
 expr6 .   expr6 ..   String concatenation
 expr2 ? expr1 : expr1

 The expression before the '?' is evaluated to a number.  If it evaluates to TRUE, the result is the value of the expression between the '?' and ':', otherwise the result is the value of the expression after the ':'.
 Example:
   :echo lnum == 1 ? "top" : lnum

  Since the first expression is an "expr2", it cannot contain another ?:.  The
  other two expressions can, thus allow for recursive use of ?:.
  Example:
    :echo lnum == 1 ? "top" : lnum == 1000 ? "last" : lnum

  To keep this readable, using |line-continuation| is suggested:
    :echo lnum == 1
    :\  ? "top"
    :\  : lnum == 1000
    :\      ? "last"
    :\      : lnum

  You should always put a space before the ':', otherwise it can be mistaken for
  use in a variable such as "a:1".