Ken Shirriff wrote:
> I read Paul Grahams's essays and have decided to try using Lisp. I'd
> like to find out how to use Lisp for tasks I typically do in, say,
> Python. Here are some examples:
>
> a) Open all files with the suffix ".abc". Look for all lines that
> contain a particular regular expression and print the matching parts.
(directory "*.abc") may work
There are plenty of regular expression libraries to use to do what you
want. Cfr. CL-AWK CL-PPCRE etc etc.
> b) Read an XML file and print out all the text entities.
www.cl-xml.org
> c) Fetch a given web page, extract the links, and pipe the results
> into an external command.
I am sure somebody can point you to to correct information here.
However, note that, as Common Lisp is a >7 implementations language (as
opposed to the 1.8 implementation laguages out there) "piping to an
external command" may be different on different implementations.
> I really don't know where to begin to solve these tasks using Lisp.
> The Common Lisp Hyper Spec and the Lisp books I looked at discuss
> "pure" Lisp programming, rather than the kinds of problems I need to
> solve. I think what I need is O'Reilly's "Lisp in a Nutshell" except
> they don't publish it.
Because they are evil :)
Cheers
--
marco