Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

There's no general solution for all types of loops and all data the loops may be iterating over. Could you explain what your data source is, and whether you're using a for/foreach loop, a while loop, or something else? I assume you're using a loop that looks like:

foreach my $element (@array) {...

But that could be a mistaken assumption. Also, how different does that last element need to be treated? What populated the array, and what will you be doing with it afterwards?

This is probably a terrible idea but you could bless a reference to the last element and detect that blessing:

my @array = qw(a b c d e f g); { local $array[-1] = $array[-1]; bless \$array[-1], 'last'; foreach my $element (@array) { if (ref(\$element) eq 'last') { print "This is the last element: "; } print "$element\n"; } }

The straightforward approach of just counting elements is less opaque. And if you're going to do that, a C style loop is probably the logical conclusion. However, if we knew more about where the data is coming from and what is really needed we may be able to provide a more on-target solution.


In reply to Re: Perl's feature to determine, in current point of loop, that this is the last one? by davido
in thread Perl's feature to determine, in current point of loop, that this is the last one? by Anonymous Monk

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 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 cooling their heels in the Monastery: (3)
As of 2022-08-12 18:17 GMT
Find Nodes?
    Voting Booth?

    No recent polls found