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Optional arguments to hash table constructors in ASL

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This commit is contained in:
Jay McCarthy 2010-08-25 10:18:39 -06:00
parent 1f830cc2c6
commit 368d711ae2
3 changed files with 37 additions and 22 deletions
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41
collects/lang/private/advanced-funs.rkt
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@ -5,7 +5,7 @@
mzlib/pretty
syntax/docprovide
scheme/promise
scheme/port
scheme/port
"../posn.ss"
(for-syntax scheme/base))
@ -41,7 +41,7 @@
(write (any -> void)
"to print the argument to stdout (in a traditional style that is somewhere between print and display)")
((pp pretty-print) (any -> void)
"like write, but with standard newlines and indentation")
"like write, but with standard newlines and indentation")
(printf (string any ... -> void)
"to format the rest of the arguments according to the first argument and print it to stdout")
(newline (-> void)
@ -67,11 +67,11 @@
("Misc"
(gensym (-> symbol?)
"to generate a new symbol, different from all symbols in the program")
"to generate a new symbol, different from all symbols in the program")
(sleep (-> positive-number void)
"to cause the program to sleep for the given number of seconds")
"to cause the program to sleep for the given number of seconds")
(current-milliseconds (-> exact-integer)
"to return the current “time” in fixnum milliseconds (possibly negative)")
"to return the current “time” in fixnum milliseconds (possibly negative)")
(force (delay -> any) "to find the delayed value; see also delay")
(promise? (any -> boolean) "to determine if a value is delayed")
@ -109,12 +109,21 @@
"to determine if a value is a box"))
("Hash Tables"
((advanced-make-hash make-hash) ((listof (list X Y)) -> (hash X Y))
"to construct a hash table from a list of mappings that uses equal? for comparisions")
((advanced-make-hasheq make-hasheq) ((listof (list X Y)) -> (hash X Y))
"to construct a hash table from a list of mappings that uses eq? for comparisions")
((advanced-make-hasheqv make-hasheqv) ((listof (list X Y)) -> (hash X Y))
"to construct a hash table from a list of mappings that uses eqv? for comparisions")
((advanced-make-hash make-hash)
(case->
(-> (hash X Y))
((listof (list X Y)) -> (hash X Y)))
"to construct a hash table from an optional list of mappings that uses equal? for comparisions")
((advanced-make-hasheq make-hasheq)
(case->
(-> (hash X Y))
((listof (list X Y)) -> (hash X Y)))
"to construct a hash table from an optional list of mappings that uses eq? for comparisions")
((advanced-make-hasheqv make-hasheqv)
(case->
(-> (hash X Y))
((listof (list X Y)) -> (hash X Y)))
"to construct a hash table from an optional list of mappings that uses eqv? for comparisions")
(hash-set! ((hash X Y) X Y -> void)
"to update a hash table with a new mapping")
(hash-ref (case->
@ -132,7 +141,7 @@
((hash X Y) X (Y -> Y) (-> Y) -> void))
"to compose hash-ref and hash-set! to update an existing mapping; the third argument is used to compute the new mapping value; the fourth argument is used as the third argument to hash-ref")
(hash-has-key? ((hash X Y) X -> boolean)
"to determine if a key is associated with a value in a hash table")
"to determine if a key is associated with a value in a hash table")
(hash-remove! ((hash X Y) X -> void)
"to remove an mapping from a hash table")
(hash-map ((hash X Y) (X Y -> A) -> (listof A))
@ -140,14 +149,14 @@
(hash-for-each ((hash X Y) (X Y -> any) -> void)
"to apply a function to each mapping of a hash table for effect only")
(hash-count (hash -> integer)
"to determine the number of keys mapped by a hash table")
"to determine the number of keys mapped by a hash table")
(hash-copy (hash -> hash)
"to copy a hash table")
(hash? (any -> boolean)
"to determine if a value is a hash table")
(hash-equal? (hash -> boolean)
"to determine if a hash table uses equal? for comparisions")
"to determine if a hash table uses equal? for comparisions")
(hash-eq? (hash -> boolean)
"to determine if a hash table uses eq? for comparisions")
"to determine if a hash table uses eq? for comparisions")
(hash-eqv? (hash -> boolean)
"to determine if a hash table uses eqv? for comparisions"))))
"to determine if a hash table uses eqv? for comparisions"))))

6
collects/lang/private/teachprims.rkt
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@ -346,15 +346,15 @@ namespace.
(apply append x)))
(define-teach advanced make-hash
(lambda (a)
(lambda ([a empty])
(make-hash (map (lambda (l) (cons (first l) (second l))) a))))
(define-teach advanced make-hasheq
(lambda (a)
(lambda ([a empty])
(make-hasheq (map (lambda (l) (cons (first l) (second l))) a))))
(define-teach advanced make-hasheqv
(lambda (a)
(lambda ([a empty])
(make-hasheqv (map (lambda (l) (cons (first l) (second l))) a))))
(provide

6
collects/tests/racket/advanced.rktl
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@ -258,6 +258,12 @@
(local [(define ht (make-hash (list (list 'a 1))))]
(begin (hash-update! ht 'b add1 (lambda () 1))
(hash-ref ht 'b))))
(htdp-test #t 'hash?
(hash? (make-hash)))
(htdp-test #t 'hash?
(hash? (make-hasheq)))
(htdp-test #t 'hash?
(hash? (make-hasheqv)))
(htdp-test #t 'hash?
(hash? (make-hash (list (list 'a 1)))))
(htdp-test #t 'hash?