Appending /*.* to default Perl variable $

geertvc has asked for the wisdom of the Perl Monks concerning the following question:

First time ever post here...

I have an array with directory names:

my @codeOutputDirs = (
    "output/$harvester$flavour/layout",
    "output/$harvester$flavour/tabview",
    "output/$harvester$flavour/udw",
    "output/$harvester$flavour/values",
    "output/$harvester$flavour/udw/service",
    "output/$harvester$flavour/udw/cfg"
);
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The variables $harvester and $flavour are passed as parameters on the command line when calling the Perl script.

I want to use a for loop to go through the array and do some stuff like so:

make_path "output/$harvester$flavour/layout";
unlink glob "output/$harvester$flavour/layout/*.*";
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And this, for each and every element in the array.

For this, I'm using the following Perl-ish (I guess?) way of traversing through each and every element of the array:

for (@codeOutputDirs) {
    make_path $_;
    unlink glob $_/*.*;
}
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The first command, make_path $_; is fine.
However, the second command has issues when I append /*.* to the default variable $_

Can someone tell me how to accomplish this using the correct syntax? Putting $_ between {} doesn't seem to be the solution.

Best,
--Geert

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Re: Appending /*.* to default Perl variable $_
by Athanasius (Archbishop) on May 26, 2020 at 07:47 UTC

Hello geertvc, and welcome to the Monastery!

The glob function expects an expression which evaluates to a string, so use either unlink glob "$_/*.*"; or unlink glob $_ . '/*.*';. (The latter form uses . as the concatenation operator.)

BTW, “has issues” isn’t very informative! In future, please detail the warning or error message(s) you are getting.

Hope that helps,

Update: Added forward slash to the concatenation example. Thanks, AnomalousMonk!

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

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Re^2: Appending /*.* to default Perl variable $_

by geertvc (Sexton) on May 26, 2020 at 16:32 UTC

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Re: Appending /*.* to default Perl variable $_
by jwkrahn (Abbot) on May 26, 2020 at 07:44 UTC

You need to put that in quotes:

    unlink glob "$_/*.*";
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