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Re^3: Running a script iteratively.

by moklevat (Priest)
on Apr 24, 2008 at 14:53 UTC ( #682646=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Running a script iteratively.
in thread Running a script iteratively.

I said it was non-robust. Perhaps I should have described it as "icky" instead?


Comment on Re^3: Running a script iteratively.
Re^4: Running a script iteratively.
by Fletch (Chancellor) on Apr 24, 2008 at 16:18 UTC

    Robustness aside (as it suffers from the same lack of error checking the other proffered version below with system has :), it doesn't express the intent behind the code correctly. Backticks are for capturing the output from an external program; system is for starting an external program who's output you don't care about.

    It's like using map in void context to iterate over a list in place of for; yes it "works", but if the line of code is not building a new list of values from an existing list then you're using the wrong "phrasing" (by which I mean 'not the clearest') to express your intent (map is for expressing transformation, for is for expressing iteration).

    (And I won't go into the "PERL scripts" I've seen that basically consisted of a shebang line and then every line was shell commands in backticks . . . *shudder* :)

    Update: Tweaked for perldoc link somewhere more relevant per prodding from kyle.

    The cake is a lie.
    The cake is a lie.
    The cake is a lie.

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