Picrin’s all built-in libraries are described below.
Utility functions and syntaces for macro definition.
Explicit renaming macro family.
Resizable random-access list.
Technically, picrin’s array is implemented as a ring-buffer, effective double-ended queue data structure (deque) that can operate pushing and poping from both of front and back in constant time. In addition to the deque interface, array provides standard sequence interface similar to functions specified by R7RS.
Returns a newly allocated array object. If capacity is given, internal data chunk of the array object will be initialized by capacity size.
(array . objs)
Returns an array initialized with objs.
(array? . obj)
Returns #t if obj is an array.
Returns the length of ary.
(array-ref ary i)
list-ref, return the object pointed by the index i.
(array-set! ary i obj)
list-set!, substitutes the object pointed by the index i with given obj.
(array-push! ary obj)
Adds obj to the end of ary.
Removes the last element of ary, and returns it.
(array-unshift! ary obj)
Adds obj to the front of ary.
Removes the first element of ary, and returns it.
(array-map proc ary)
Performs mapping operation on ary.
(array-for-each proc ary)
Performs mapping operation on ary, but discards the result.
Converts ary into list.
Converts list into array.
Symbol-to-object hash table.
Returns a newly allocated empty dictionary.
(dictionary . plist)
Returns a dictionary initialized with the content of plist.
Returns #t if obj is a dictionary.
(dictionary-ref dict key)
Look up dictionary dict for a value associated with key. If dict has a slot for key key, a pair containing the key object and the associated value is returned. Otherwise #f is returned.
(dictionary-set! dict key obj)
If there is no value already associated with key, this function newly creates a binding of key with obj. Otherwise, updates the existing binding with given obj.
If obj is #undefined, this procedure behaves like a deleter: it will remove the key/value slot with the name key from the dictionary. When no slot is associated with key, it will do nothing.
Returns the number of registered elements in dict.
(dicitonary-map proc dict)
Perform mapping action onto dictionary object.
procis called by a sequence
(proc key1 key2 ...).
(dictionary-for-each proc dict)
dictionary-map, but discards the result.
Conversion between dictionary and alist/plist.
When you start the REPL, you are dropped into here.