Re: Unicode case conversion
Re: Unicode case conversion
- Subject: Re: Unicode case conversion
- From: Glenn Andreas <email@hidden>
- Date: Wed, 24 Nov 2004 22:01:38 -0600
At 7:04 PM -0700 11/24/04, Robbie Haertel wrote:
I'm not very knowledgeable about the unichar type. I need to compare
characters one-by-one so I use the characterAtIndex: from NSString to
get the character and use '==' et al to do the comparison. However,
in some cases I need to change the unichar to lower and compare them.
What function will do this? I can't just convert the NSString to
lowercase a priori because I need to maintain the case information in
most cases. I'm sure there is a simple lower() function that takes a
unichar argument.
Thanks in advance.
Robbie
One of the problems is that the upper/lower case
representation of some characters can become more
than one character. A classic example is the
German "esset" ß (that thing that looks kind of
like a B) which is a double-s, which, when
capitalized, becomes two "S"'s. And of course
there is no easy reverse (since the lowercase
version of "SS" becomes "ss" by default).
You could probably extract the single character
as a string and send "lower" to that (though this
could be expensive if you do it a lot).
What exactly are you trying to accomplish that
requires stepping through the characters of a
string one at a time and sometimes needing to
convert to lowercase? There may well be a better
way to handle this...
--
Glenn Andreas email@hidden
<http://www.gandreas.com/> oh my!
Mad, Bad, and Dangerous to Know
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