alan8762's articles:

Items(7) /1

Does ANSI Common Lisp have pattern matching? 57 29 (5/4/2007 9:55:09 PM) comp.lang.lisp Previously I've accepted the conventional wisdom that ANSI Common Lisp does NOT have pattern matching. It doesn't strike me as an important question; there are pattern matching macros out there if I need them. ... Alan

Is this a good use for restart-bind? 3 28 (3/31/2006 12:01:54 PM) comp.lang.lisp ;;;; Using restart-bind to offer explanations for errors ;; Basic example: Let us define a version of member ;; that signals an error if it cannot find the item in then list. (defun known-member (item list) ... Alan

Style questions 26 51 (10/7/2005 4:04:45 PM) comp.lang.lisp Consider finding the winner of a race (defun winner (list-of-runners-and-their-times) (reduce (lambda (x y) (if ( (FRED 201) Is the variable name `(runner time)' 1) a good use of a multiple escape to ... Alan

Does my macro create C style pointers? 7 27 (9/21/2004 8:54:40 PM) comp.lang.lisp In C you can pass the address of a variable to a function, allowing the function to update the value of the variable. CL's lexical variables don't permit this. If you are "old school" then you make free use of... Alan

CLX - size limits in xlib:put-raw-image 0 39 (2/9/2004 5:54:21 PM) comp.lang.lisp I've nearly got put-raw-image working on my hardware, using true colour and 24 bits per pixel If the number of columns is a multiple of 4 there is no problem. Otherwise the number of bytes in each line has to ... Alan

handler-case versus handler-bind 9 40 (1/22/2004 11:47:43 AM) comp.lang.lisp I'm trying to learn the CL condition system. I particularly wanted to follow the thread on Newtons method. I found the condition stuff baffling. I couldn't see were the error was thrown from. I'm been working... Alan

Nested case statements 36 26 (1/15/2004 11:13:58 AM) comp.lang.lisp Background ---------- There are various autoformat tools for composing HTML. They transform a "convenience language" into HTML. An example of what they do is transforming "That's /really/ cool :->" to "That's r... Alan

alan8762's replies:

Items(351) /36 Next >> Last >|

Remove-common function in Lisp 10 22 (4/9/2008 11:28:20 PM) comp.lang.lisp I am trying to implement a function which will remove the common items in two lists and if there're no common items, it'll return the original list. Here's the code that I have written but it's not not returni... rahul.mallo (11)

macrolet like flet 18 24 (4/13/2008 10:38:35 AM) comp.lang.lisp I read in Paul Graham's Ansi Common Lisp that MACROLET behaves (in analogy) somewhat like FLET in the sense that the local macros may not call one another. But what if the desired behavior were more like LABELS... rocco.rossi (103)

grow list by tail, pointer example recipe -- please comment 16 32 (4/16/2008 1:54:38 AM) comp.lang.lisp Hello readers. (This is a follow up on a previous tasting question. A subdiscussion on that thread focused on Ken Tilton's method of growing a list by its tail. I figured that may be a topic for the common l... mirko.vukovic (406)

The empty list and the end of a list 30 21 (4/19/2008 7:38:06 AM) comp.lang.lisp At page 124 of "Common Lisp An Interactive Approach" there is an exercise where it is requested to write the function FLATTEN that takes a list (tree) as input and returns a list of all atoms. It is also reques... someone7026 (172)

A question (confusion) about closure 23 39 (5/2/2008 8:31:18 AM) comp.lang.lisp Hi, I have a confusion regarding closure and its definition. As per Paul Graham: When a function refers to a variable defined outside it, it=92s called a free variable. A function that refers to free lexical ... samikc (2)

define-modify-macro #2 5 26 (5/10/2008 10:03:24 AM) comp.lang.lisp I was just reading the chapter on macros in Paul Graham's ANSI Common Lisp, and I came across the part regarding define-modify-macro. It explains why a custom definition of incf like the following is no good: ... rocco.rossi (103)

walk through list and add all n'th item 16 28 (5/15/2008 10:03:49 PM) comp.lang.lisp I'm just wondering if there is a lispier way to scan once through a list and add each n'th item with n+constant. Like kind of apply a list through a vector.. In my approach i just used the loop macro: (defpara... google.bo (21)

pairs 11 27 (5/26/2008 4:04:39 PM) comp.lang.lisp Consider: (defun pairs (set) (if (null set) nil (append (let ((r) (e (car set))) (dolist (x (cdr set) (nreverse r)) (push (list e x) r))) (pairs (cdr set))))) (defun... verec (363)

The "do" macro 10 26 (6/10/2008 4:53:11 PM) comp.lang.lisp I wanted to ask how I can create a macro that is equivalent to "do" but allows me to use multiple end tests. For example, I want to be able to type something like this: (do ((x 2 (+ x 5)) (y 3 (+ y 5))) (... irdaqramo (3)

One reason Lisp hasn't caught on: the name 54 92 (6/18/2008 9:16:24 PM) comp.lang.lisp Like it or not, in marketing , the first thing that matters is the name of the programming language. Just ask the marketers at Sun, or Matz. Those were good names. Whoever gave Lisp it's name, I don't think pe... irishhacker (41)