This library provides convenient procedures.
Returns given object's values associated with key. The default
implementation uses slot-ref.
Following classes are specialised by default.
<hashtable> uses hashtable-ref
<list> uses list-ref
<string> uses string-ref
<vector> uses vector-ref
Returns string represented object.
Returns integer represented object.
Returns number represented object.
The default value is 0.
If the given object is number, it returns given object itself.
If the given object is string, it uses string->number as a
conversion procedure.
If the given object is character, it uses char->integer as a
conversion procedure.