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>>Every possible CHAR maps to an upper case equivalent, even if it is a
>>map back to itself. So, a->A, b->B, space->space, {([at]})nowhere.xy
>>reason why this should not be so, and no reason why it should be >inefficient to implement.
>
>
> So maybe you should do some studies in Assembler then, the explanation why CAPS is that incredible fast (compared to Strings.Upper) has already been given by Chris Burrows, IIRC.
>
> But since it seems you missed his excellent explanation, here it is, in short words, again (it's been a long time since I dabbled in ASM, so forgive me, if there's something inexact in the following):
>
> In the Latin-1 character set, "a" differs from "A" by 1 bit that is set in the case of "a", and not set in the case of "A".
>
> a = 1100001
> A = 1000001
>
> b = 1100010
> B = 1000010
>
4 suggestions
Write that in COBOL.
For a IBM machine.
That not use ASCII.
For a non-english lang, say.. catalan.
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Received on Thu Sep 16 2004 - 16:27:19 UTC