Your code works:

$fullName = "c:\\path\\boo's";

@string_parts = split(/\\/,$fullName);
foreach $part (@string_parts){ 
    $newName = $part;
}
$newName =~ s/\'//g;

print("$newName\n");

__END__
output
======
boos

[download]

Are you sure it's an apostrophe and not a (unicode?) character that looks like one? Or maybe a backtick (`)?

By the way,
foreach $part (@string_parts) { $newName = $part; }
can be reduced to
$newName = $string_parts[-1];

In reply to Re: How to remove an apostrophe? by ikegami
in thread How to remove an apostrophe? by sfhazel

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