Hi,

yesterday I somewhat fixed a version of my "progress bar fillup" I created after this thread. Most of the ideas came from tye.
This version uses a closure, and might be of use for one or another of you. Usage is simple:

my $pb = pb_fillup(<showlen>,<char>,<barlen>);
[download]

Initializes the progress-bar. It defines how long the data to be munged are (showlen), what character should be used for progress visualization (char) and how long the progress bar shall be (barlen). All 3 are scalars. If you wish to init a progress bar with a [#######    ] look&feel, that should show progress reading a file and be 40 chars wide, you could init it like that:

my $pb = pb_fillup(-s $file,'#',40);
[download]

Where $file is a name of an existing file. The calls doing the actual visualization are like that:

print $pb->(length $_);
[download]

You either give the closure the length of data you have munged or - if you omit the parameter - pb_fillup just does an increment. I´m sure, the code can be much optimized and beautified, but it´s pretty easy to use and does accomplish its task for me.

Bye
Richard

Oh! The code:

sub pb_fillup {
    my ($max,$char,$len) = @_;         # init look&feel
    my $old_slen = -1;                 # init old showlength
    my $cur = 0;                       # init current length
 
    return sub {
        $cur += @_ ? shift : 1;
        my $slen = int $cur/$max*$len;
        my $bar;
 
        if($slen != $old_slen) {
            $bar = $char x $slen;
            $bar .= ' ' x ($len - $slen);
 
        $| = 1;
            print '[',$bar,']';
            print "\b" x ($len+2);
        $| = 0;
            $old_slen = $slen;
        }
        return;
    }
}
[download]

---

---

• 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.