On Mar 5, 2009, at 10:20 PM, Allen Wirfs-Brock wrote:
The NOTE following toUpperCase (15.5.4.18) says:
NOTE
Because both toUpperCase and toLowerCase have context-sensitive
behaviour, the functions are not symmetrical. In other words,
s.toUpperCase().toLowerCase() is not necessarily equal to
s.toLowerCase().
This text is a carry over from ES3 and would seem to imply that
context sensitive processing is expected.
IIRC this is merely about characters such as Turkish dotless-I:
js> s = "\u0131"
1
js> s.toUpperCase()
I
js> s.toUpperCase().charCodeAt(0)
73
js> s.toUpperCase().toLowerCase()
i
/be
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