Are there any differences between what in Common Lisp you\'d call an atom, and a symbol? Do these differences extend开发者_如何学运维 to other languages in the Lisp family?
I\'m using DrRacket for Scheme Programming. for I\'m not a person wh开发者_运维技巧o use native English, I need to print out east asian language.
I\'m currently trying to do exercise 1.22, which needs a function called runtime that returns the number of milliseconds the system 开发者_如何学运维has been running. However, my environment (R5RS) do
Is there a way to check if a variable exists in Scheme?Even doing things like (if variab开发者_Go百科le) or (null? variable) cause errors because the variable is not defined.Is there some function tha
I\'ve learned scheme and quickly mastered a lot of it, then did a project in it just fine. Literally took me days to finish. I\'m now trying to learn common lisp to get a feel for that and now I\'m ju
I am trying to write a function that evaluates to the number of distinct characters in the input string str. So for example (distinct-char \"eeeiicczz\") would return 4. I need some help with my code.
I have to do a term project in my symbolic programming class. But I\'m no开发者_StackOverflow中文版t really sure what a good/legitimate project would be. Can anyone give me examples of symbolic progra
The object returned by delay in Scheme is \"a promise\", but promises are not considered to be a type (so there is no promise? procedure, and it\'s not listed as a type in R5RS or R6RS).
I can\'t seem to test a function I wrote in PLT Racket using the test-engine/racket-tests package. The code is listed below.It returns multiple values (not sure why they don\'t call them tuples).
I am trying to write a scheme function that takes a list of the form: ((#f ((1 1) (2 1))) (#f ((1 3) (5 1)))
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