vim default syntax for files with no extension

Question

How do I set up a default syntax for files that have no extension in vim?

Answer 1

To pick the default syntax for files without an extension, you can create an autocommand that checks if the filename contains a ., and if not, switches to the desired syntax:

autocmd BufNewFile,BufRead * if expand('%:t') !~ '\.' | set syntax=perl | endif

This one picks perl as a default syntax, but you can simply use whichever is appropriate.