Re^2: Strange finish!!

One should also make it a habit to leave a comma in hash definitions.

%fortytwo = (
   "I have" => "the answer\n",
);
[download]

You don't have to take care of fixing the previous line, when adding a new one.

%fortytwo = (
   "I have" => "the answer\n",
   "to"     => "Life, the Universe, and Everything\n",
);
[download]

print+qq(\L@{[ref\&@]}@{['@'x7^'!#2/"!4']});

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Re^3: Strange finish!! by holli (Abbot) on Nov 07, 2007 at 13:26 UTC
One should also make it a habit to leave a comma in hash definitions... And then you get bitten by exactly that habit when dealing with JavaScript: `var foo = {a:'A', b:'B',}; //syntax error` [download] holli, /regexed monk/	[reply] [d/l]
Re^4: Strange finish!! by KurtSchwind (Chaplain) on Nov 07, 2007 at 15:45 UTC
Not just javascript, but C and Java as well. In fact, Perl is the first language I've seen that allows (and actually encourages) trailing commas like that. I have to admit, it's really handy. I hate editing big SQL statements and moving things around because I inevitably have a `select A,B,C, from FOO;` give me an error. Perl gives us the luxury of making the statements easy to move around or append to. Nice feature that. -- I used to drive a Heisenbergmobile, but every time I looked at the speedometer, I got lost.	[reply] [d/l]
Re^5: Strange finish!! by tilly (Archbishop) on Nov 07, 2007 at 20:16 UTC
This is solvable with formatting. I always format SQL like this: `SELECT A , B , C FROM FOO, BAR WHERE foo.barid = bar.barid AND foo.something = 'special value'` [download] and then adding/removing fields from the SQL statement is far less likely to give me errors.	[reply] [d/l]
Re^5: Strange finish!! by AK108 (Friar) on Nov 07, 2007 at 16:52 UTC
It's also very useful when generating Perl code via a program. You don't need to worry about omitting the final comma, which the generation code.	[reply]
Re^5: Strange finish!! by holli (Abbot) on Nov 10, 2007 at 05:40 UTC
I chose the Javascript analogy because the Javascipt Object Notation is pretty similar to Perl datastructure syntax. (Basically replace => by : and you're done). From what I know there is no such thing for Java or C. holli, /regexed monk/	[reply] [d/l]