On 4/6/06, Michael Goldshteyn <[EMAIL PROTECTED]> wrote:
> That is, why does the output differ between:
>
> perl -e "print join(\"\n\",@{[`dir`]});"
>
> and
>
> dir | perl -pne ""
First of all, you haven't told us how it differs. Since dir is an
os-specific command, most of the people on this list can't duplicate
your results for themselves.
On a side note, why do you mess around with with the anonymous array nonsense?
print join("\n", `dir`);
# perl -e "print join(\"\n\", `dir`);"
yeilds the same result with half the complexity.
That said, the only differnce I see between the piped system command
and the backticks when I run your code is in the line spacing. This is
because you've asked perl to double space the lines. As you can see
from the output of dir or
perl -e "print `dir`"
# or for that true array experience:
# perl -e "print @{[`dir`]}"
dir returns newlines as part of the data stream. unless you chomp them
off, they stay there. And when you join with \n, you add a second
newline to the end of every element in the list.
HTH,
-- jay
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