CODEWITHSUNDEEP
vim
Fuseteam
Fuseteam

Reputation: 396

How to execute Vim commands in looped functions

I am trying to write a function to simplify the command to switch windows in Vim. I have managed to get it to work as :W <argument>:

function! s:winswitch(...)
          let i = 0
          while i < argc()
                  let command = ":wincmd ".a:1
                  execute command
                  let i = i + 1
          endwhile
  endfunction
  command! -nargs=+ W call s:winswitch(<f-args>)

This works in making :W l function as :wincmd l.

I'm looking for a way for it to execute the commands based on an arbitrary number of arguments such as I can use :W j h to function as :wincmd j|wincmd h.

Upvotes: 1

Views: 422

Answers (2)

Ingo Karkat
Ingo Karkat

Reputation: 172520

The optional function arguments (...) are available in the List a:000, in addition to the separate a:1, a:2, ...

You actually don't need to use the length (via a:0, not argc()!) and explicit indexing if you switch from :while to a :for loop:

for arg in a:000
    let command = 'wincmd ' . arg

If for some reason you need to use indexing, I would still prefer :for:

for i in range(a:0)
    let command = 'wincmd ' . a:000[i]

Upvotes: 3

phd
phd

Reputation: 94417

The problem in your code is in argc() — it doesn't count the arguments to the function, it counts the file arguments in the command line. Most probably argc() is 1 when you run the code so the loop is executing only once.

To count the arguments to the function use a:0 instead of argc():

while i < a:0
    let command = ":wincmd " . a:000[i]

Upvotes: 2

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