11 PLT 3x hash utilities

(require (planet untyped/unlib/hash-table))

Useful hash utilities. These procedures are compatible with the PLT 3 / mzscheme language procedure names for hashes.

(make-hash-table/pairs data ...) → hash-table?

data : pair

Creates a hash table from the supplied data. The result has strong keys and uses equal? as a key comparison function.

(hash-table-mapped? hash key) → boolean?

hash : hash?

key : any

Returns #t if key is stored in hash, #f otherwise.

(hash-table-keys hash) → list?

hash : hash?

Returns a (randomly ordered) list of the keys stored in hash.

(hash-table-values hash) → list?

hash : hash?

Returns a (randomly ordered) list of the values stored in hash.