[ale] OT: Perl Question

[Mike Fletcher]

>>>>> "Robert" == Robert L Harris <nomad at rnd-consulting.com> writes:

    Robert> Ok, I'm writing a perl script that looks at files in
    Robert> specific directories.  At one point, I'm trying to grep
    Robert> file names out of an array.  I'm using:

    Robert> $Skip=grep(/$File/, at FileList);

    Robert> Yes, I do want a scalar returned.  At any rate, there is a
    Robert> point where $File="c++decl" and then I get this error:

    Robert> //usr/bin/c++decl/: nested *?+ in regexp at
    Robert> ./wanderblock.pl line 170.

    Robert> Anyone know a way around this?  Basically, all I need to
    Robert> know is if $File is in @FileList, not it's position or
    Robert> anything else.

        You want to use either the \Q\E special escapes, or the
corresponding `quotemeta' function:

=item quotemeta EXPR

=item quotemeta

Returns the value of EXPR with all non-alphanumeric
characters backslashed.  (That is, all characters not matching
C</[A-Za-z_0-9]/> will be preceded by a backslash in the
returned string, regardless of any locale settings.)
This is the internal function implementing
the C<\Q> escape in double-quoted strings.

If EXPR is omitted, uses C<$_>.


        E.g. in your case one of:

{my $f = quotemeta $File; $skip = grep /$f/, @FileList}

        or

$skip = grep /\Q$File/, @FileList;

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