Re^2: Build your array with push

Something in me really doesn't like that trailing comma, which I wouldn't have expected to work. I suspect it's just an old habit, as it doesn't work in C & C++, which is still there lurking at the back of my mind and occasionally poisoning the Perl code that I write. OK, I'll try and get used to it, and thanks for introducing me to it - I trust that it really has no effect.

Now to get back some of that lost XP by upvoting the helpful replies...
ah, I like being a Friar anyway, it goes with my T-shirt.

Comment on Re^2: Build your array with push

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Re^3: Build your array with push by Roy Johnson (Monsignor) on Jan 31, 2006 at 16:44 UTC
you don't have to merely trust; it's documented in perldata: You may have an optional comma before the closing parenthesis of a list literal In fact, you can have extra commas anywhere you want in a list except (for reasons I can't explain) at the very front of it. They will not cause `undef` items to be created, nor will including nested empty lists. `my @items = ((),,,,5); print "<$_>\n" for @items; # prints only one item` [download] Caution: Contents may have been coded under pressure.	[reply] [d/l] [select]
Re^3: Build your array with push by integral (Hermit) on Jan 31, 2006 at 19:40 UTC
Actually it does work in C, and that's most likely where perl picked up the habit too. One reason it's very useful is when you're generating code with macros, it's much easier to append commas to things than to insert them between things. -- integral, resident of freenode's #perl	[reply]
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