use if $] < 5.008, 'IO::Scalar';
# IO::Scalar is needed in pre-5.8 Perl
my $var = ''; # this is the variable we will be writing to or readi
+ng from
my $fh; # this is a filehandle, reads and writes will go to $
+var
if ($] < 5.008) {$fh = new IO::Scalar \$var}
else {open $fh, '+<', \$var}
$fh or die "can't get filehandle for \$var: $!";
print $fh "These print statements will\n";
print $fh "be appended to \$var.\n";
seek $fh, 0, 0; # reading and writing <$fh> will seek in $var.
my $var1 = <$fh>;
my $var2 = <$fh>;
print $var1; # print "These print statements will\n"
print $var2; # print "be appended to \$var.\n"
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.