const VS static final class variable ?
On Aug 17, 2007, at 1:10 PM, Garrett Smith wrote:
what is the difference between x1 and x2?
class A { const x1; static final x2;
You need a var before x2. Also you can't add final except before
classes and methods (the reference implementation currently parses
'class A { static final var x; }' but that's a bug).
Are you thinking of Java, or some other language here? If this is
based on an ES4 example or spec, can you cite the URL?
The obvious difference, ignoring the intended illegality of static
final var x2, is that x2 is static, so per class, not per instance.
On Aug 17, 2007, at 3:37 PM, Brendan Eich wrote:
On Aug 17, 2007, at 1:10 PM, Garrett Smith wrote:
what is the difference between x1 and x2?
class A { const x1; static final x2;
You need a var before x2. Also you can't add final except before classes and methods (the reference implementation currently parses 'class A { static final var x; }' but that's a bug).
Are you thinking of Java, or some other language here? If this is based on an ES4 example or spec, can you cite the URL?
The obvious difference, ignoring the intended illegality of static final var x2, is that x2 is static, so per class, not per instance.
I should add that const is write-once, so you can have a const x1
instance field. A constructor could write three different values to
three different instances' x1 fields. In this case const does not
mean per-class, as static const does, or a hypothetical static final
var might.
what is the difference between x1 and x2?
class A { const x1; static final x2; }
what is the difference between x1 and x2? class A { const x1; static final x2; }