- This article is a stub, which means that it is not detailed enough and needs to be expanded. Please help us by .
Perm is a language built around permutations. For the moment, it is undecided whether this should be procedural or functional.
This is a work in progress, and any help on filling in the blanks would be appreciated.
- Any decimal integer, n, computes the transposition (0 n)
- Therefore 0 is the identity permutation
- The . operator computes the product of the two operands
- ~ is the end-of-line comment delimiter
1.2.3 ~computes (0 1)*(0 2)*(0 3), or (0 1 2 3)
- The unary - computes the inverse of a permutation
- This means 1 == -1
- Parentheses can be used to group operations
-(1.2) ~computes the inverse of (0 1 2), or (0 2 1)
Functions and Flow Control