LispForum

Not necessarily: (defun firstzero (x y z) (cond ((= 0 x) 'first) ((= 0 y) 'second) ((= 0 z) 'third) (t 'none))) a minimal form of the code above: (defun firstzero(x y z)(cond((= 0 x)'first)((= 0 y)'second)((= 0 z)'third)(t'none))) It has 84 characters. But yeah, your code after minimalization is sho...

I would decompose it to two problems. filling in to the rectangle transposing Rectangularization: (define (repeat n elem) (if (= n 0) '() (cons elem (repeat (- n 1) elem)))) (define (fill-list lst len elem) (if (>= (length lst) len) lst (append lst (repeat (- len (length lst)) elem)))) (define (make...

(my-map '((d g) (6 9) (w r))) I should get '((d 6 w) (g 9 r)) as output as per single map logic. my-map don't solve your problem, it's an implementation of standard map function. It's a part of solution, which still is: (define (transpose data) (apply my-map my-list data)) I think '(a b) is a membe...

It doesn't involve calculations, it's checking value's type whether it falls under the number type. The values of primitive types are usually unboxed, although they are tagged.

Ahh nuntius was faster.

As OP requested, I'm providing here a detailed explanation of my solution. First of all I'm versed in Common Lisp not so much in Scheme. But let's go: I'd been looking for &rest counterpart from CL and find this neat construction, where in place of the argument list you put just one symbol/varia...

I once tried SSCL in DOSBox, there are also non-free versions e.g. GCLISP . When I was porting ccmake (part of the cmake ) to DOS, for a moment I had an intention to port a mature CL implementation (such as SBCL) to DOS, but I resigned from it because of its complexity. Note aside: I had found and u...

I do not want to use any ! function Do you mean not using functions with side effects? The short solution : (define (transpose data) (apply map list data)) since I want to understand recursion. Let's define own map , list : (define my-list (lambda elems elems)) (define (single-map fn lst) (if (null...

What input? *x* is just a variable, if you mean the standard input you have to read it and just call atleast-filter.

That's quite simple:

I'd say Java made a big step with Java 8 and loosened the paradigm.