Eric Arnold wrote:
> This seems like a klunky way of getting a value from getbufvar().
>
> let attach_to = {}
> if len( getbufvar( bufnr, 'attach_to' ) ) > 0
> let attach_to = getbufvar( bufnr, 'attach_to' )
> endif
> if len( attach_to ) > 0
>
> If I simply use
>
> let attach_to = {}
> let attach_to = getbufvar( bufnr, 'attach_to' )
> if len( attach_to ) > 0
> .......
> it will fail on variable type when the target for getbufvar(), i.e.
> b:attach_to doesn't exist. Fortunately, len() is smart enough to
> take different types, so there is a workaround.
>
> I don't know if there's a good way around this without easing up on
> the variable type-checking, and [re-]initialize variables to the
> correct type upon assignment. This would make life soooooo much
> easier with Vim 7 script.
I assume you have used the "attach_to" variable somewhere before. Then
this should work fine:
unlet! attach_to
let attach_to = getbufvar( bufnr, 'attach_to' )
if len(attach_to) > 0
Obviously getbufvar() cannot use a default type (empty list, empty
dictionary, zero...) when a variable does not exist.
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