Beefy Boxes and Bandwidth Generously Provided by pair Networks
Keep It Simple, Stupid

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I see three possible solutions to this:
  1. 1) Save the value in another variable, using Readonly if you want to ensure the saved value doesn't get modified.
  2. 2) Use a closure.
  3. 3) Interpolate the variable in an eval'd anonymous subroutine.
use Readonly; my $str = 'hi'; # String Readonly my $STR => $str; # Closure my $closure = do { my $var = $str; sub { $var } }; # Evalled Sub my $anonsub = do { (my $var = $str) =~ s/(["\\])/\\$1/g; eval qq{sub {"$var"}}; }; $str = 'hello'; print "string = $STR\n"; print "closure = ", $closure->(), "\n"; print "anonsub = ", $anonsub->(), "\n";

In reply to Re: simple anonymous subroutine and variable interpolation timing question by wind
in thread simple anonymous subroutine and variable interpolation timing question by tj_thompson

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 studying the Monastery: (1)
As of 2023-06-02 18:20 GMT
Find Nodes?
    Voting Booth?

    No recent polls found