Tips for golfing in Racket / Scheme
lambda are synonymous keywords for constructing anonymous functions, but
λ is 2 bytes where
lambda is 6.
In Scheme, there's no such keyword
λ and you're stuck with
~a to convert numbers and symbols to strings.
When using Racket, bind variables using
λ to shave off a few bytes. In Scheme,
lambda makes this trick not applicable, unless one is binding four or more variables.
Example: One variable saves 2 bytes over
(define n 55)(* n n) ; 20 bytes (let([n 55])(* n n)) ; 20 bytes ((λ(n)(* n n))55) ; 18 bytes