Re^2: Five Ways to Reverse a String of Words (C#, Perl 5, Perl6, Ruby, Haskell)

in reply to Re: Five Ways to Reverse a String of Words (C#, Perl 5, Perl6, Ruby, Haskell)
in thread Five Ways to Reverse a String of Words (C#, Perl 5, Perl 6, Ruby, Haskell)

Nice, but you're counting on the special variable $" to have its default value. There's no reason for people not to touch it.

Either use join, or use

local $" = ' ';
[download]

in your sub.

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Re^3: Five Ways to Reverse a String of Words (C#, Perl 5, Perl6, Ruby, Haskell) by shmem (Canon) on Dec 13, 2006 at 11:37 UTC
...yeah, and if I get paranoid I also check whether the stringify and/or (de)ref operators are overloaded, and maybe somebody changed shift and reverse via e.g. schwern's Function::Override... ;-) I guess that if somebody changes $" globally, they have a reason, now don't they? --shmem update: inserted globally _($_=" "x(1<<5)."?\n".q·/)Oo. G°\ / /\_¯/(q / ---------------------------- \__(m.====·.(_("always off the crowd"))."· ");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}	[reply]
Re^4: Five Ways to Reverse a String of Words (C#, Perl 5, Perl6, Ruby, Haskell) by bart (Canon) on Dec 13, 2006 at 11:48 UTC
Humbug. If your function API isn't explicitely saying it's using the current value of $", then it shouldn't use its current value. Do not assume people haven't touched it. They have every right to, without having to appologize for it, to you.	[reply]
Re^5: Five Ways to Reverse a String of Words (C#, Perl 5, Perl6, Ruby, Haskell) by shmem (Canon) on Dec 13, 2006 at 11:56 UTC
Keep cool. I didn't publish any function API, but I might do so. Anyways, you're right in "counting on the default value", and in production use $" should be localized. I just didn't find it being necessary in the context of this thread. --shmem _($_=" "x(1<<5)."?\n".q·/)Oo. G°\ / /\_¯/(q / ---------------------------- \__(m.====·.(_("always off the crowd"))."· ");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}	[reply]
Re^4: Five Ways to Reverse a String of Words (C#, Perl 5, Perl6, Ruby, Haskell) by Anonymous Monk on Dec 13, 2006 at 16:01 UTC
Don't forget code filters, too! :-) Just because it says "sub" doesn't mean it actually means sub! ;-)	[reply]


laziness, impatience, and hubris
	PerlMonks

Re^2: Five Ways to Reverse a String of Words (C#, Perl 5, Perl6, Ruby, Haskell)

How many continents have you visited?