Exploratory one-liners with less typing
Here's one for the "stupid shell tricks" category:
I made myself a shell alias today to simplify the times when i want a quick view of how something works in perl:
alias perl1='perl -MData::Dumper -MYAML::Any -MClass::Autouse=:superloader -E "sub D(\$){ say Dumper(shift) } sub Y(\$){ say Dump(shift) }"'
I'm not quite sure about the name, and I may add more helper functions, but a handy alias like this one allows me to type this at the shell:
perl1 -E 'D [File::Spec->path]'
Instead of
perl -MData::Dumper -MFile::Spec -E 'say Dumper( [File::Spec->path] )'
I don't have to type out -MData::Dumper and I can use D instead of say Dumper()
Plus, thanks to Class::Autouse and it's :superloader import tag
I don't have to type out Module::Name ("File::Spec" for example) multiple times
just to get a quick glance at it's output.
I haven't decided yet if I want to just append " -E" to the alias. That might get in the way if I want the "-n" or "-p" flags or multiple -E's or something...
Anyway... thought that was handy; Thought I'd share.
perl -C -E 'say"i \x{2764} ",($^X =~ m#([^/]+)$#)'
This is cool.
If you use it often, maybe pi, which has the added benefit that using tab completion in the shell will still give you a space after perl if you don't want to use the alias.
I would also include
-Muft8::all. No wide-char warnings.You could write it as a function instead, then you can do something like
so that
-Ewill be prepended to the arguments only if you didn’t include switches in them yourself. (Code untested, too tired.)Thanks,
utf8::allis probably a good one for this, though the-Cflag performs a similar function for one-liners.Thanks.
I considered a function to test args much like you suggested but just haven't decided yet.
I was most happy about the Class::Autouse and the D sub with the prototype.
The
-Eis still fairly natural to me (unlike the multiple-Margs).I figure everybody will make their own to suit themselves anyway.
But, hey, thanks for the
set --trick. I did not know about that one!oops... markdown doesn't seem to be supported in comments...
Randy, you might want to look at Data::Printer instead of Data::Dumper there.
It is, but not by default. You can turn it on somewhere in the settings, though.
Thanks for this. It's ironic that I use shell aliases all the time, even for small things like 'git status' (gs), 'emacs -nw' (emacs), 'mplayer' (m). Can't believe I have not used it with Perl!
Marc Fontani created a gist based on this, adding some more features https://gist.github.com/1042504. I forked his gist and made https://gist.github.com/1240122. Thanks for posting this cool idea. I had fun hacking on it.