rc-tricks

Some snippets of code written in Plan 9's rc shell.

Arithmetic

Functional Programming

All functions in the funcs file, other than buf, set and r store the result of their operation in the variable $R. These functions are intended to provide similar functionality to that available in functional programming languages such as Haskell, OCaml and Lisp.

dedup removes all duplication elements from an array.

r outputs the return value($R) of a function.

match compares two strings and returns true if they're the same.

filter runs a function on every element in an array, and returns the element if it returns true.

fold combines an array into a single element via a function.

list declares an array.

invert reverses an array.

map runs a function on every element in an array, and returns the result.

Use

Use a file's functions in a 'namespace'!

![Use demonstration(img/use.png)