Another great alternatives for making temporary filehandles is IO::File's new_tmpfile() method.
I prefer to use this method when their is no need to know the name of the file. In fact, IO::File hides these implementation details from you completly, and very nicely I might add. It Does the Right Thing with respect to security, file permissions and the naming of the file to ensure there is no "filename collisions".
Here's a quick example to illustrate how close it is compared to standard IO::File handle:
use IO::File;
my $temp_fh = IO::File->new_tmpfile
or die "Could not open a temporary file: $!";
#Save some stuff in the file handle
$temp_fh->print('this stuff to the file handle');
#Rewind to the beginning
$temp_fh->seek(0, 0);
#It can do anything that a normal IO::File file handle can
while(my $line = <$temp_fh>) {
print $line; #prints 'this stuff to the file handle'
}
I find temp files are really useful if you need to do alot of processing on large files/strings, and you can't do all the processing in memory.
Here you will see a real-world example of IO::File's new_tmpfile() method in action. I wrote this example to show an interesting way to prepend any string to a filehandle.
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.
|
|