Utf8.widthindex
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Available since: Gideros 2016.06
Class: utf8
Description
Returns the character index at given location in string s. This is a reverse operation of utf8.width().
(number) = utf8.widthindex(s,location,ambi_is_double,default_width)
This function returns an index of location, and an offset in in UTF-8 encoding. e.g. if cursor is at the second column (middle) of the wide char, offset will be 2. The width of character index is also returned.
Parameters
s: (string)
location: (number)
ambi_is_double: (boolean) optional
default_width: (number) optional
Return values
Returns (number) character index at given location
