Re: String comparison

["Matt 'Matic' Page (Lua)" <lua@...>]

Andreas,
"a" is greater than "A" because of the ASCII definitions!
"a" is character 97 decimal, while "A" is decimal 65.

To compare in a case-insensitive way, just convert both strings to 
uppercase (or lowercase) with string.upper.
(Of course there are other ways to do this :-)
Matt

Andreas Falkenhahn wrote:
> Hi,
>
> I noticed that the following expression is actually FALSE in lua:
>
> "Big" > "ants"
>
> This seems to happen because of the difference in case because
> the following expression is TRUE:
>
> "Big" > "Ants"
>
> Is there any specific reason why lua does string comparison in
> this way? I.e. giving lower case characters a higher priority than
> all of the upper case characters? I.e. the following is TRUE:
>
> "a" > "Z"
>
> It's a little bit confusing... especially when using the sort() function
> of lua's table library. When sorting a string table using this function,
> the sorted table will have two different entities, upper and lower case,
> e.g. doing
>
> t = {"Dave", "dave", "mary", "Mary", "Adam", "adam"}
> table.sort(t)
>
> will lead to:
>
> Adam
> Dave
> Mary
> adam
> dave
> mary
>
> But I'd like to have it like this:
>
> Adam
> adam
> Dave
> dave
> Mary
> mary
>
> Is there any way to change this behaviour or do I have to use a
> custom sort callback with table.sort() that does a case insensitive
> string comparison? But that would probably be very slow... 
>
> Tks for any ideas,
>
> Andreas
> --
> "Remember: It's nice to be important but it's more important to be nice!"
>
>
>
>