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Milo 287dba62b6 fixups 3 weeks ago
README.md fixups 3 weeks ago

README.md

Racket “wat”s

inspired by Gary Bernhardt’s original “Wat” talk

This repository is an ongoing work in progress, and is intended to be a community effort. If you have anything new wat’s to contribute, or think one should be removed, please create a pull request!

List of wat’s

  • Numbers are mutable
Welcome to Racket v7.5.0.900.
> (immutable? 5)
#f
  • Unquote can be weird:
Welcome to Racket v7.5.0.900.
> `(4 . ,(+ 1 2))
(4 . 3)
> '(4 . ,(+ 1 2))
'(4 unquote (+ 1 2))
  • Argument order for collections:
Welcome to Racket v7.5.0.900.
> (member 'x (list 'x 'y))
#t
> (vector-member 'x (vector 'x 'y))
#t
> (set-member? (set 'x 'y) 'x)
#t
  • gensym is special
Welcome to Racket v7.5.0.900.
> (define x (gensym))
> x
'g78
> (eq? x 'g78)
#f
  • hash-map doesn’t return a hash
Welcome to Racket v7.5.0.900.
> (map list '(1 2 3))
'((1) (2) (3))
> (vector-map list #(1 2 3))
'#((1) (2) (3))
> (hash-map (hash 'x 1 'y 2) list)
'((x 1) (y 2))  ; that's not a hash map...
  • TODO more