LispForum

Thanks everyone for your help. I FINALLY understand how the tree works. It's pretty simple when I got down to it. I got a create-tree function set up. and it seems to work no errors so far. just understanding the concept was the hardest part. I also got an insert function. my print function isn't wo...

Re the global variable: Just (setf *example-list* new-value) -- though why not pass the list as a parameter? Re the undefined function: Did you copy his prompt function into your package and compile it first? Ya I put it in my package and ran (load "CS.lisp") and it said *** - EVAL: undef...

Ah Ok i think I understand. Although our Professor emailed us because people were asking. APPARENTLY i was just supposed to read in all the values into a list and then do the other functions. instead of what I initially thought (reading in an integer 1 by 1, then performing the task on it....1 by 1)...

Ok so it'd be something like defun readin() (let ((list ;; <- this is the variable created, its value will be the next form (loop for value = (prompt "Please enter an integer or \"end\" to finish:") until (eq value 'end) collect value))) )) Btw thanks a ton. u've been a HUGE help...

Ok So it's saved into the variable list "element" there im assuming? or is the list variable actually called list (sorry this is my first time with lisp lol.....can u tell haha)?


Either way could I make this into a function that I could use in my function loop?

You mean like this? cl-user> (loop for value = (prompt "Please enter an integer or \"end\" to finish:") until (eq value 'end) collect value) Please enter an integer or "end" to finish:: 1 Please enter an integer or "end" to finish:: 2 Please enter an integer ...

Well Is there any way to read these into a list? (like add them)

say User enters 5
the list is [5]
I do my functions/insert/etc
Next the user enters 7
the list is now [5 7]
do functions/insert etc/

and so on..

Simple question which sadly I cannot find an answer to. Basically Im finishing up my ternary tree Program (it was in another thread) but I Have the Insert/ and print functions done. problem is is that I need to read in integers into a list before I run the insert/print function on them. Anyways Befo...

Oh ok I think I understand, so it's a way of matching.
I've noticed it's used in "Tree's" alot. maybe simply a way of binding values to nodes perhaps

I was reading up on Trees and such in the book "Practical Common Lisp" but I dont exactly understand what DESTRUCTURING-BIND does exactly? but it seems to be used in alot of tree's when dealing with lisp? can someone give me a very simple layout of what exactly this function does? (remembe...