Difference between revisions of "Oh"
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The oh shell ([https://aur.archlinux.org/packages.php?ID=58587 AUR]), formerly known as "gosh", is inspired by the Plan9 shell [http://cm.bell-labs.com/sys/doc/rc.html rc] and written in Google's new [http://golang.org/ Go] programming language, which also is inspired by Plan9 in some ways. | The oh shell ([https://aur.archlinux.org/packages.php?ID=58587 AUR]), formerly known as "gosh", is inspired by the Plan9 shell [http://cm.bell-labs.com/sys/doc/rc.html rc] and written in Google's new [http://golang.org/ Go] programming language, which also is inspired by Plan9 in some ways. | ||
− | From the official [https://github.com/michaelmacinnis/oh/blob/master/README README]: | + | From the official [https://github.com/michaelmacinnis/oh/blob/master/README.md README]: |
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Oh is a Unix shell written in Go. Like the rc shell, oh is similar in spirit | Oh is a Unix shell written in Go. Like the rc shell, oh is similar in spirit |
Revision as of 18:48, 24 May 2013
The oh shell (AUR), formerly known as "gosh", is inspired by the Plan9 shell rc and written in Google's new Go programming language, which also is inspired by Plan9 in some ways.
From the official README:
Oh is a Unix shell written in Go. Like the rc shell, oh is similar in spirit but different in detail from other Unix shells.
Oh extends the shell's programming language features without sacrificing the shell's interactive features. The following commands behave as expected:
date cat /usr/share/dict/words who >user.names who >>user.names wc <file echo [a-f]*.c who | wc who; date cc *.c & mkdir junk && cd junk cd .. rm -r junk || echo "rm failed!"
Oh has objects but no classes. Objects can be created from scratch using the 'object' command. Private members are defined using the 'define' command and public members are defined using the 'public' command:
define point: object { define x: integer 0 define y: integer 0 public move: method a b { set $self::x: add $self::x a set $self::y: add $self::y b } public show: method { echo $self::x $self::y } }
Objects can also be created by cloning an existing object:
define o: point::clone
Modules are objects. The command below creates an object called 'm'. Public, top-level definitions in 'file' can be accessed using the object 'm'.
define m: import file
Channels are objects. Oh exposes channels, which are implicit in other shells in the form of pipes, as first-class values. Channels can be created with the 'channel' command:
define c: channel
Oh incorporates many features, including first-class functions, from the Scheme dialect of Lisp. Like Lisp, oh uses the same syntax for code and data. When data is sent across a channel it is converted to text so that it can be sent to (or even through) external Unix programs.