Finding invisible/non printable characters in a string

[Paul Dupuis]

There are characters that consist of more than one codepoint - composite 
versions of characters for accents. See 
https://unicode-table.com/en/blocks/combining-diacritical-marks/


I think the best way is to scan the codepoints looking for 
codePointToNum values that are 0-31 (exclude tab and cr/lfs if you like) 
and 127 (DEL). There may be some others in the 128-255 range that are 
not printable. I forget off the top of my head.



On 5/10/2021 5:49 AM, David V Glasgow via use-livecode wrote:
> Hi folks, hope everyone is well.
>
> Would I be right in thinking if codepoint count > the number of chars in a text string, then it probably contains invisible characters?
>
> Or would I need to search through Hex to check?
>
> Or something much easier and cleverer that I hadn’t even considered.  Because that’s what this list and working with Livecode is like.
>
> Cheers
>
> David Glasgow
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