Question

以下是一个例子：

function! Mynumber(arg)
  echo line(".") . " " . a:arg
endfunction

当你1,3call Mynumber(getline("."))时，它会打印行号和当前缓冲区的前三行中的每一行。

Answer 1

变量的前缀a:表示此变量属于其出现的函数的参数列表（参数）。

另见:help internal-variables

There are several name spaces for variables.  Which one is to be used is
specified by what is prepended:

        (nothing) In a function: local to a function; otherwise: global
buffer-variable    b:     Local to the current buffer.
window-variable    w:     Local to the current window.
tabpage-variable   t:     Local to the current tab page.
global-variable    g:     Global.
local-variable     l:     Local to a function.
script-variable    s:     Local to a :source'ed Vim script.
function-argument  a:     Function argument (only inside a function).
vim-variable         v:   Global, predefined by Vim.

Answer 2

“当你编写一个带参数的Vimscript函数时，你总是需要用这些参数作为前缀：当你用它们告诉Vim它们在参数范围内时。”
来源（强烈推荐阅读）：http://learnvimscriptthehardway.stevelosh.com/chapters/24.html

什么是：arg在vimscript中意味着什么？

2 个答案: