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I usually make my life easier with iterate:

sure you can, look here for example: http://github.com/ks/X.LET-STAR
this is how you make your defpackage:

(defpackage :your-lib
(:use :common-lisp :x.let-star ...)
(:shadowing-import-from x.let-star let*) ;; the important line
...)

But what is the Dynamic-extent for? From what i read, it declares the variables value not usable outside the body. I guess that would make a difference, but not sure if for those integers, i mean, they're copied when you pass them, right? Looking at the examples in clhs you are not supposed to do w...

I guess this one is also useful sometimes: Beware - it uses my let-star library. To remove dependency - replace `(let* ((,dim-syms (array-dimensions ,matrix))) with `(destructuring-bind (,dim-syms) (array-dimensions ,matrix) ....) (defmacro do-matrix-indices (indices matrix &body body) (let ((in...

Hmm, never really needed the previous of the last of the list. Counting is a nice touch, but i do prefer give things one purpose, of course you could do: (collecting (:onto your-list) (let ((cnt 0) (before-last (last your-list 2))) (flet ((collecting (element) (setq cnt (+ cnt 1) before-last (or (c...

gugamilare wrote:

karol.skocik wrote:

Code: Select all

(defun before-last (list)
  (if (cddr list)
      (before-last (cdr list))
      list))

You can use (last list 2) instead:

Code: Select all

CL-USER> (last '(1 2 3 4 5 6) 2)
(5 6)

Thanks! Didn't know that.
Karol

I sometimes use a handy macro which allows me to construct lists in order (without need to be reversed). Also, it has a nice feature - keeps size of the list - no need to #'length at the end when you need it. And the best features at the end - it gives you a hand on last and previous to last element...

grault wrote:... I'd suggest metabang-bind ....

Use http://github.com/ks/X.LET-STAR instead of bind, it's user extensible and nicer

Karol

I would say, there is a chance sooner or later you will need: http://www.cliki.net/CXML on CXML page are also other very useful libraries for handling xml validation and xpath library. Also, everything from Edi Weitz is worth recommending: http://weitz.de/ For DB stuff, you may appreciate http://com...

I have been a little annoyed by this: Having flets, lets, macrolets and symbol-macrolets separate all the time has disadvantages. 1) More nested then need be, implying more parenthesis, more depth of indentation. 2) Sometimes need lets or flets in some specific order, causing more nesting. So it mi...