4 ms·

but rc doesn't have built in regex and doesn't have hash tables. My guess is that bash is trying to be a full scripting language these days, sort of like perl.

MisterTea 7y ago
Because rc is a shell to run commands, hence the name rc, run command. For the tasks you mentioned you would use a program or language such as awk to handle those cases.
dexen 7y ago
>but rc doesn't have built in regex and doesn't have hash tables That's an advantage; Plan 9 provides awk for those use cases. There is a clear separation, and a simple yet powerful language for communication (pipes, file descriptors, and files). >bash is trying to be a full scripting language these days Arguably Bash over-did somewhere around the time they added support for TCP connections exec {FD}<>/dev/tcp/news.ycombinator.com/80; echo GET / >&$FD; cat <&$FD
- cat199 7y ago
  Not sure if arguing for plan9 simplicity by pointing out bashisms designed to emulate how one might use sockets on plan9/rc is the best strategy.
  - AnIdiotOnTheNet 7y ago
    The difference being that such functionality arose from the fundamentals of how plan9 worked, whereas bash hacked in a simulacrum.
- nimrody 7y ago
  Actually, that's something that seems inspired by Plan 9 with its /net/tcp/xxx files. Bash just tries to make it cross platform so it cannot rely on the host OS like rc does.
  - mprovost 7y ago
    There were already netcat and similar tools that worked together with bash to provide this functionality.
- chubot 7y ago
  Maybe there was a clear separation 30 years ago, but there no longer is. The shortcut for the posts below is that you can write a Lisp in all of shell, awk, and make (and sed too) [1] I won't get to this in Oil (without help) but I still think it's valid. The languages have so much overlap that they should just be combined. Of course that's what Perl was (leaving out Make), but Raku and Python 3 seem to have left a hole in that design space. Shell, Awk, and Make Should Be Combined http://www.oilshell.org/blog/2016/11/13.html http://www.oilshell.org/blog/2016/11/13.html Example Code in Shell, Awk, and Make http://www.oilshell.org/blog/2016/11/14.html http://www.oilshell.org/blog/2016/11/14.html [1] https://github.com/kanaka/mal/tree/master/impls https://github.com/kanaka/mal/tree/master/impls

MisterTea 7y ago

Because rc is a shell to run commands, hence the name rc, run command. For the tasks you mentioned you would use a program or language such as awk to handle those cases.

dexen 7y ago

>but rc doesn't have built in regex and doesn't have hash tables That's an advantage; Plan 9 provides awk for those use cases. There is a clear separation, and a simple yet powerful language for communication (pipes, file descriptors, and files). >bash is trying to be a full scripting language these days Arguably Bash over-did somewhere around the time they added support for TCP connections exec {FD}<>/dev/tcp/news.ycombinator.com/80; echo GET / >&$FD; cat <&$FD

cat199 7y ago
Not sure if arguing for plan9 simplicity by pointing out bashisms designed to emulate how one might use sockets on plan9/rc is the best strategy.
- AnIdiotOnTheNet 7y ago
  The difference being that such functionality arose from the fundamentals of how plan9 worked, whereas bash hacked in a simulacrum.
nimrody 7y ago
Actually, that's something that seems inspired by Plan 9 with its /net/tcp/xxx files. Bash just tries to make it cross platform so it cannot rely on the host OS like rc does.
- mprovost 7y ago
  There were already netcat and similar tools that worked together with bash to provide this functionality.
chubot 7y ago
Maybe there was a clear separation 30 years ago, but there no longer is. The shortcut for the posts below is that you can write a Lisp in all of shell, awk, and make (and sed too) [1] I won't get to this in Oil (without help) but I still think it's valid. The languages have so much overlap that they should just be combined. Of course that's what Perl was (leaving out Make), but Raku and Python 3 seem to have left a hole in that design space. Shell, Awk, and Make Should Be Combined http://www.oilshell.org/blog/2016/11/13.html http://www.oilshell.org/blog/2016/11/13.html Example Code in Shell, Awk, and Make http://www.oilshell.org/blog/2016/11/14.html http://www.oilshell.org/blog/2016/11/14.html [1] https://github.com/kanaka/mal/tree/master/impls https://github.com/kanaka/mal/tree/master/impls