Beefy Boxes and Bandwidth Generously Provided by pair Networks
Problems? Is your data what you think it is?

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I'm currently writing a program which passes some user information around in a hash. In one of the subroutines of one of my files, the address of $_ is the same as the address of some of my data

\$_ = SCALAR(0x401ba594)
\$u->{loc} = SCALAR(0x401ba594)

I traced the problem down to this line of code in another file (which calls the above sub)

foreach ($u->{loc}) { ... }

So my question, how does the scoping apply to $_? I know that it's in package 'main', so it's global throughout my program (even across separate files). Can I make it local temporarily, or is there some other trick I can use? I'd like to avoid something like (foreach $a ($u->{loc})) because I actually have that foreach line in many spots, with lots of pattern matching, so it keeps my code cleaner to use $_. Is copying $u->{loc} into a temp variable prior to the foreach perhaps the best solution?

Thanks for any help,

In reply to $_ scoping issues by swkronenfeld

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • 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.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others browsing the Monastery: (6)
As of 2023-03-22 09:35 GMT
Find Nodes?
    Voting Booth?
    Which type of climate do you prefer to live in?

    Results (60 votes). Check out past polls.