in reply to $^O empty in windows powershell

For a full answer:

PS copied many concepts from Bash and Perl. (After all it's an attempt to fix problems with cmd and bat and full of aliases to support *nix commands)

For instance 

C:\tmp>powershell
Windows PowerShell
Copyright (C) Microsoft Corporation. Alle Rechte vorbehalten.


PS C:\tmp> $x="xxx"
PS C:\tmp> echo "a${x}b"
axxxb
PS C:\tmp> echo 'a${x}b'
a${x}b
PS C:\tmp> exit

C:\tmp>

[download]

That's why you need a single-quoted string for perl -e

Cheers Rolf
(addicted to the 𐍀𐌴𐍂𐌻 Programming Language :)
Wikisyntax for the Monastery

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Re^2: $^O empty in windows powershell
by WithABeard (Beadle) on Nov 22, 2022 at 14:17 UTC

    the following code does not output anything:

    perl -e 'print "this is a test";'

    I can't figure out why, shouldn't this work?

    this works though:

    perl -e 'print qq(this is a test);'
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[d/l]
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      my guess is that doublequotes are stripped from the input

      PS C:\Windows\system32> perl -E'say @ARGV' 'say "bla"'
say bla
PS C:\Windows\system32> perl -E'say @ARGV' 'say qq(bla)'
say qq(bla)
PS C:\Windows\system32> echo 'say "bla"'
say "bla"
PS C:\Windows\system32> echo 'print "bla"' |perl
bla
PS C:\Windows\system32> echo 'print "bla"' |perl -E'say <>'
print "bla"
PS C:\Windows\system32>

      [download]

      this could be an artifact of Perl trying to repair input from CMD ... (?)

      (I think eyepops will soon come up with an older discussion about the Perl trying to cleverly fix CMD idiosyncrasies ;)

      Cheers Rolf
      (addicted to the 𐍀𐌴𐍂𐌻 Programming Language :)
      Wikisyntax for the Monastery

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[d/l]
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