2014-03-30 17:00 GMT+04:00 Andre Sihera <[email protected]>:
> On 30/03/14 20:32, Yasuhiro MATSUMOTO wrote:
>
>> index(sprit("こんにちわ世界", "\zs"), "世") should return 5
>>
>>
>> Now this is interesting.
>
> index() does indeed split on character, not byteboundaries. However, even
> if
> I can do this:
>
> split("こんにちわ世界", '\zs')
>
> to get this:
>
> ['こ', 'ん', 'に', 'ち', 'わ', '世', '界']
>
> it still doesn't allow me to do a search for "世界" (i.e. a word) and get the
> answer 5. Instead I have to break my search word into individual characters
> and then perform a manual character by character comparison - in ViM
> script.
> Absolutely no good for performance, especially if I'm processing big text
> files.
>
> Incidentally, checking this yielded yet another inconsistency. The reverse
> of
> index() is the array subscript operator "[...]" which works directly on
> strings
> to get a character. e.g.
>
> 1111
> 01234567890123
> echo "this is a test"[5]
>
> correctly yields "i". However, if I do this:
>
> ０１２３４５６
> echo "こんにちわ世界"[5]
>
> instead of getting "世" (6th character), it wrongly returns the 6th byte and
> gives me "<93>", which I presume is a byte midway through a UTF-8 character
> sequence.
>
>
Just fyi, it can be done easier:
let my_str = "こんにちわ世界"
let match_start = match(my_str, "世界", 0, 1)
echo strchars(my_str[: match_start - 1])
- returns 5, which is correct.
> This is not good. These inconsistencies need to be fixed.
>
>
Of course, I agree.
>
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