Dear Monks,

I can not understand why this works:

my $x = <<'EOX';
A {
  B 123
  C xyz
}
EOX
$x =~ s/A\s*\{.+?\}//s;
print "x='$x'\n"; # empty

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but this does not (linux terminal):

perl -pe 's/A\s*\{.+?\}//s' <<'EOX'
A {
  B 123
  C xyz
}
EOX
# prints exactly what the input is

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I have checked if there are mistaken shell interpolations to the oneliner script, but there are not, I think:

x='s/A\s*\{.+?\}//s'
echo $x
# s/A\s*\{.+?\}//s

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Edit: the same problem if the oneliner operates on a file:

cat > infile<<'EOX'
A {
  B 123
  C xyz
}
EOX
perl -pe 's/A\s*\{.+?\}//s' infile
# or perl -i -pe 's/A\s*\{.+?\}//s' infile

[download]

In reply to Why dot does not match newline in oneliner but it does in script, with /s modifier? by bliako

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