On Tue, Jan 26, 2016 at 10:29 PM, Bram Moolenaar <[email protected]> wrote:
>
> Yukihiro Nakadaira wrote:
>
> > :echo jsondecode('{"":"x"}')
> > E713: Cannot use empty key for Dictionary
> >
> > Will Vim allow empty key?
>
> Hmm, if you take the standard literally I suppose it allows for an empty
> key. In practice it's an indication something went wrong.
>
> Why are you asking, do you see a practical application for it?
>
I don't know practical example in JSON.
In Vim script, counting line is a possible example.
let d = {}
for line in getline(1, '$')
let d[line] = get(d, line, 0) + 1
endfor
for line in getline(1, '$')
if d[line] == 1
do something
else
do something
endif
endfor
Patience diff algorithm uses such a method, for example.
https://github.com/ynkdir/vim-diff/blob/master/autoload/diff/patience.vim
Although, there is a workaround like d['x'.line] = ...
> The standard also allows for duplicate names, even though in practice
> that doesn't work. So even though it's valid JSON, it doesn't mean it's
> a valid value after converting from JSON to Vim types.
>
> So the error is actually correct, it's not saying the JSON is invalid,
> it's saying the result in Vim types is invalid.
>
I see.
--
Yukihiro Nakadaira - [email protected]
--
--
You received this message from the "vim_dev" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php
---
You received this message because you are subscribed to the Google Groups
"vim_dev" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
For more options, visit https://groups.google.com/d/optout.
