Once upon a time, you opened files in Perl like so:
open(FH, ">$filename");
At some point, for many good reasons including some very sticky ones involving filenames with leading spaces, this syntax became available (and, immediately, preferred):
open(FH, '>', $filename);
What version of Perl did we get that syntax with?
Looks like 5.6.0.
open my $fh, '>:raw', $filename came about at the same time -- it appears so.
Commented
Feb 5, 2010 at 21:36
When you have those sorts of questions, start crawling back through the perl*delta documents. You can mostly skip the minor versions since those versions shouldn't introduce major features.
In this case, you'd find it in perl56delta.
openoperation, though, that's theopenoperation plus a form of failure handling that may or may not be appropriate to context. I only wanted to talk aboutopen.corelist(search.cpan.org/dist/Module-CoreList) invaluable for telling me what version of Perl contains a given module. E.g.corelist /File::Spec/from the command line. Very handy when you're trying to figure out which additional modules you need to install on some other computer.