11 PLT 4x hash utilities

(require (planet untyped/unlib/hash))

Useful hash utilities. These procedures are compatible with the PLT 4 procedure names for hashes.

(make-hash/alist data) → hash?

data : (listof pair?)

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

(make-hasheq/alist data) → hash?

data : (listof pair?)

Creates a mutable hash using the supplied data. The result has strong keys and uses eq? as a key comparison function.

(make-weak-hash/alist data) → hash?

data : (listof pair?)

Creates a mutable hash using the supplied data. The result has weak keys and uses equal? as a key comparison function.

(make-weak-hasheq/alist data) → hash?

data : (listof pair?)

Creates a mutable hash using the supplied data. The result has weak keys and uses eq? as a key comparison function.

(hash-set? hash key) → boolean?

hash : hash?

key : any

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

(hash-keys hash) → list?

hash : hash?

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

(hash-values hash) → list?

hash : hash?

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