Questions tagged [lisp]
This challenge is related to the Lisp family of languages. Note that challenges that require the answers to be in a specific language are generally discouraged.
16 questions
7 votes
1 answer
343 views
Draw an ASCII-art diagram of an S-expression
An S-expression is a way of writing a nested list or tree of data, which you may recognize from their use in Lisp, which uses them for source code. An S-expression is made up of atoms, in this ...
- 12.6k
27 votes
7 answers
2k views
Ungolf my tinylisp code
I like golfing in tinylisp: (d M(q((x)(i x(i(disp x)0(M x))0 But I also like posting explanations with nicely formatted code: ...
- 40.7k
9 votes
7 answers
848 views
Reverse cadaddadadaddddaddddddr [closed]
The Lisp language has a family of functions car, cdr, cadr, etc for accessing arrays. For ...
- 46.2k
20 votes
11 answers
4k views
I'm Lazy: Close my Superparens
Picolisp has a feature called "super parentheses": Brackets ('[' and ']') can be used as super parentheses. A closing bracket will match [all parentheses to and including] the innermost ...
- 1,496
18 votes
21 answers
3k views
cadaddadadaddddaddddddr - linked list accessing
Create a function (or closest equivalent, or full program) that takes an list of some datatype (your choice) that may be nested and a string (in either order), and generalizes the lisp c[ad]+r ...
- 1,496
1 vote
1 answer
375 views
Polyglot "Hello world" in Fortran and Lisp [duplicate]
Simple challenge: The code must be both valid Lisp and valid Fortran, and must print out "hello world" in both. Note: I've sunk about 5 hours into this at this point, I'm not even sure it's possible ...
35 votes
2 answers
3k views
Generate Pyramid Scheme code
Pyramid Scheme is a language being developed by @ConorO'Brien. In Pyramid Scheme, the code that you write looks like this: ...
- 9,457
9 votes
5 answers
461 views
Tips for golfing in tinylisp
tinylisp is, in its essence, a very stripped-down version of Lisp, as the name suggests. It was made by @DLosc for an "interpret this language" challenge, which can ...
- 7,000
47 votes
2 answers
2k views
McCarthy's LISP
McCarthy's 1959 LISP In early 1959, John McCarthy wrote a groundbreaking paper defining just nine primitive functions that when put together still form the basis for all LISP-like languages today. ...
- 1,371
5 votes
2 answers
563 views
Tips for golfing in Common Lisp [duplicate]
What general tips do you have for golfing in Common Lisp? I'm looking for ideas which can be applied to code-golf problems and which are also at least somewhat specific to Common Lisp (e.g. "remove ...
- 993
12 votes
5 answers
2k views
Tips for golfing in Lisp
What general tips are these for golfing in Lisp (any dialect)? Please post one tip per answer, and only answers that are specific to a dialect of Lisp (e.g. "remove comments" is not an answer). ...
- 2,217
21 votes
9 answers
1k views
Tips for golfing in Racket / Scheme
What general tips do you have for golfing in Racket / Scheme? I'm looking for ideas that can be applied to code golf problems in general that are at least somewhat specific to Racket / Scheme (e.g. "...
- 6,050
44 votes
7 answers
5k views
Tiny Lisp, tiny interpreter
Lisp programmers boast that Lisp is a powerful language which can be built up from a very small set of primitive operations. Let's put that idea into practice by golfing an interpreter for a dialect ...
- 40.7k
19 votes
8 answers
1k views
Lisp Extraction Mission
In Lisp style languages, a list is usually defined like this: (list 1 2 3) For the purposes of this challenge, all lists will only contain positive integers or ...
- 8,649
15 votes
4 answers
2k views
That's almost Lisp!
Challenge Your challenge is to design an interpreter for a lisp-like language, which will from hence forth be coined: GLisp. The program code for GLisp will consist of an arbitrary amount of nested ...
- 1,190