Being able to put commas at the end of hash declarations is a small but handy productivity enhancement. If you have declared
my %hash = (
a => 1,
b => 2,
c => 3,
);
then you can reorder, for example, the
b and
c entries
without having to add a comma after
c and remove it after
b.
On an Oracle course, I learnt an SQL idiom of putting commas
before
the line:
select
name
,age
,hair
from ...
giving similar benefits (not for the first line of course). Out of longstanding Perl habit, I did the same in Javascript
var obj = {
a: 1,
b: 2,
c: 3,
};which works in the Spidermonkey javascript as implemented in Firefox etc., but
not in MSIE, where it gives an "Object expected" error. (Actually it gave the
error on the wrong line due to not processing script includes properly, but
that's another story).
