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Re^2: What operator should perl5porters use for safe dereferencing?

by Anonymous Monk
on Jun 04, 2012 at 04:51 UTC ( #974223=note: print w/replies, xml ) Need Help??

in reply to Re: What operator should perl5porters use for safe dereferencing?
in thread What operator should perl5porters use for safe dereferencing?

~> is less characters, but is more travel. I like ->> because it's the same input as -> but with the last character repeated.

~> also looks too similar to -> on some fonts at a glance, so ->> has the advantage of being shaped differently. Of course it does have the disadvantage that a junior might think it's a typo and 'fix' it.

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Re^3: What operator should perl5porters use for safe dereferencing?
by cavac (Deacon) on Jun 17, 2012 at 18:23 UTC

    I agree,
    ~> and
    -> are just too similar.

    Depending on the font (and you can not always choose the one you like, especially online), you really have to look hard. I pretty much guarantee that code audits as well as helping out on SoPW will get a lot harder.

    As for the typing effort, a character more or less really doesn't matter. Those of us who use non-english keyboards (so, most of us really) already have a hard time coding Perl and other programming languages. Some examples from my german keyboard:

    • ~ is (Alt Gr)(+)
    • \ is (Alt Gr)()
    • { is (Alt Gr)(7)
    • [ is (Alt Gr)(8)

    In effect, a lot of the "standard" metacharacters require awkward right-hand-only acrobatics. I thought about using an english/american keyboard, but since i also require german umlauts that would just shift the problem. Just changing the keyboard layout in software is also a bit awkward, since then the printing on the keys does not match what i type (which i find rather confusing).

    In short, i don't care if i have to type two or three characters, since something like ?-> is easier to read and harder to overlook (and in this case actually easier to type on my german keyboard as well).

    And, from my personal view, i always associate ~ operations with some kind of regular expression stuff, whereas ? does not.

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