lisp

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Scheme: change value of an element in a list

I hate using SO as a way to find simple functions, but I really can\'t find a function like this anywhere:开发者_如何学JAVA[详细]

2023-04-04 16:52 分类：问答
Lisp: How to override default string representation for CLOS class?

In Common Lisp, how can I override the default s开发者_如何学运维tring representation of a CLOS class so that calls to format or princ will print something intelligible, even when objects of that clas[详细]

2023-04-04 16:52 分类：问答
Are variable and symbol different in Lisp?

numberp is a predicate in Lisp, and (numberp 1) 开发者_如何学JAVAreturns T as expected. But if I only type numberp in the console, it prompts that the variable name is undefined.[详细]

2023-04-04 09:56 分类：问答
How to understand the parameter binding in macro definition in Lisp?

As shown in the below Lisp code, (defvar a 1) (defvar b 2) (defmacro macro-add (c d) `(开发者_运维技巧+ ,c ,d))[详细]

2023-04-04 05:22 分类：问答
Problems with Nth in common lisp

I\'m trying to write a function that can calculate GPA. Now I can do limited calculation(only 3 ),but I stuck on how to calculate more , without using loop or recursion (that\'s the requirement of sub[详细]

2023-04-03 21:10 分类：问答
"is not of type LIST" error

I am doing Exercise 14.11 in \"A Gentle Introduction to Symbolic Computation,\" and wrote the following function:[详细]

2023-04-03 20:41 分类：问答
Make an arbitrary function safe to run?

I\'m writing the docs of my program online, in a wiki, and my intent is to rip that content from the program itself, either from time to time or on demand.[详细]

2023-04-03 11:06 分类：问答
Clojure Method Missing

Does anybody know how to implement method_missing (à la Ruby) in Clojure? E.g. (defn method_missing [name &开发者_运维问答 args][详细]

2023-04-02 11:08 分类：问答
Navigating top-level Lisp/Clojure forms in Vim

I useVim for Clojure development. I\'d like a movement key or mapping that will jump through the top-level forms in th开发者_开发技巧e buffer. { and } are close, but stop if there\'s a blank line in t[详细]

2023-04-02 09:31 分类：问答
Define n functions at once in Lisp

Suppose I want to do the following: (loop for i from 1 to n do (defun ith(lst) (nth i lst))) Apparently what I really want to do is the following:[详细]

2023-04-02 02:35 分类：问答