Re: Perl oddities

The fact that a comma after a map block is a syntax error:

$ perl -e 'map { $_ }, qw/foo bar/'
syntax error at -e line 1, near "},"
Execution of -e aborted due to compilation errors.
[download]

I'm fine with it not being required, but it shouldn't yell at you if you happen to include it.

"There is no shame in being self-taught, only in not trying to learn in the first place." -- Atrus, Myst: The Book of D'ni.

Comment on Re: Perl oddities Download Code

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Re^2: Perl oddities by TimToady (Parson) on Mar 01, 2005 at 20:29 UTC
The comma after the block is optional in Perl 6. On the other hand, you have to use a block there. The expression form is not supported in Perl 6. Or more precisely, the first arguments will be expected to be an expression that returns a closure to be executed.	[reply]
Re^2: Perl oddities by dragonchild (Archbishop) on Mar 01, 2005 at 14:36 UTC
And if you're trying to map your inputs into hashrefs with a comma, you can't. :-/ Being right, does not endow the right to be rude; politeness costs nothing. Being unknowing, is not the same as being stupid. Expressing a contrary opinion, whether to the individual or the group, is more often a sign of deeper thought than of cantankerous belligerence. Do not mistake your goals as the only goals; your opinion as the only opinion; your confidence as correctness. Saying you know better is not the same as explaining you know better.	[reply]
Re^3: Perl oddities by Joost (Canon) on Mar 01, 2005 at 14:42 UTC
Sure you can, but you need the dreaded +: `print map +{$_}, qw/foo bar/` [download] "What should it profit a man, if he should win a flame war, yet lose his cool?"	[reply] [d/l]
Re^4: Perl oddities by Anonymous Monk on Mar 01, 2005 at 16:16 UTC
No, you don't need the `+`: `print map {"$_",}, qw/foo bar/` [download] works as well, although you need more characters. I don't think there is any case in Perl where you need unary minus for disambiguation where you can't disambiguate in another way using 2 or 3 other keystrokes. Unary plus is just a convenience, not a requirement.	[reply] [d/l]
Re^5: Perl oddities by hardburn (Abbot) on Mar 01, 2005 at 16:18 UTC
Re^6: Perl oddities by Anonymous Monk on Mar 01, 2005 at 16:49 UTC


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