The problem here is that the matching is being performed against a quoted string rather than a named variable - From the documentation for pos:
pos SCALAR
pos Returns the offset of where the last "m//g" search
left off for the variable in question ($_ is used
when the variable is not specified). May be modi-
fied to change that offset. Such modification
will also influence the "\G" zero-width assertion
in regular expressions. See perlre and perlop.
If your code was modified thus, matching against a variable rather than a quoted string, it would execute without error:
my $var = 'the quick brown fox';
while( $var =~ m/(.)/g ) {
print "Matched '$1' \@ pos:", pos($var), "\n";
}
perl -le 'print+unpack("N",pack("B32","00000000000000000000000111111001"))'
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|