Choosing a new language
Stephen Leake
stephen_leake at stephe-leake.org
Sat Dec 29 08:41:43 EST 2007
George Neuner <gneuner2/@/comcast.net> writes:
> On Fri, 28 Dec 2007 12:54:57 -0800, John Nagle <nagle at animats.com>
> wrote:
>
>> Actually, the ability to "fix a running program" [in Lisp] isn't
>>that useful in real life. It's more cool than useful. Editing a
>>program from a break was more important back when computers were slower
>>and just rerunning from the beginning was expensive.
>
> Speak for yourself.
>
> The ability to patch a running program is very useful for certain
> types of embedded applications. Not every program having high
> availability requirements can be restarted quickly, or can be
> implemented reasonably using multiple servers or processes to allow
> rolling restarts.
And in applications like IDEs, dynamically loaded functions are very
important. Improving Emacs is vastly easier because Emacs Lisp is
interpreted. You can make a small change to a function and quickly
determine its effect. That's one reason (among many others :) I have
not switched to GPS (which is written in Ada).
--
-- Stephe
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