A REPL Story(sprungcanary.net)
sprungcanary.net
A REPL Story
http://sprungcanary.net/2015/11/29/a-repl-story/
5 comments
Swift has a REPL. On an OS X command line, simply type 'swift'.
Imagine if they detect that Lisp and Smalltalk have Inspectors for data... -> more blog posts about the wonders of 'REPL', Clojure and Functional Programming.
> clojure.core defines the vars print-length and print-level
I wonder where all this is coming from? ;-)
Lisp programmers practice interactive 'bottom up programming' for decades now.
See for example Erik Sandewall's article 'Programming in an Interactive Environment: the "Lisp" Experience' from 1978:
https://www.ida.liu.se/ext/caisor/archive/1978/001/caisor-19...
> clojure.core defines the vars print-length and print-level
I wonder where all this is coming from? ;-)
Lisp programmers practice interactive 'bottom up programming' for decades now.
See for example Erik Sandewall's article 'Programming in an Interactive Environment: the "Lisp" Experience' from 1978:
https://www.ida.liu.se/ext/caisor/archive/1978/001/caisor-19...
Clojure is a lisp.
I think what lispm is getting at is that there a large number of Clojure programmers that do not realize that Clojure's features and the workflows it enables have been around for decades.
Fair enough, I guess the article is aimed mostly at newbies to clojure though, which mostly come from a non-lisp background.
That style of interactive exploratory programming is supported by a gazillion of languages and implementations. There is nothing Clojure specific about it.
From the early Lisp to most other forms of Lisp-derived languages (like Logo, Dylan, ...), over APL, Mathematica, up to Apple's Swift...
From the early Lisp to most other forms of Lisp-derived languages (like Logo, Dylan, ...), over APL, Mathematica, up to Apple's Swift...
Neither is the article nor I arguing that in any way.
It is a case study of developing a clojure program in the repl, done to inspire newcomers, not a scientific article claiming clojure invented the repl.
It explicitly mentions clojure, functional programming and a repl to enable this.
None of that is necessary. One can nicely use Smalltalk (recent version: Pharo), its object-oriented programming and its interactive IDE for that.
None of that is necessary. One can nicely use Smalltalk (recent version: Pharo), its object-oriented programming and its interactive IDE for that.
Just because it mentions it doesn't means it claims it's necessary.
The author states
" If you're new to Clojure, or functional programming, or languages that have a REPL, I hope this encourages you to crack open a REPL and start to think about your own story. It's a means to whatever end you have in mind. "
and even points to a super general google search.
https://www.google.de/search?client=safari&rls=en&q=repl+dri...
Did you actually read the thing, or just open it close it and decide to hat it because it not CL?
The author states
" If you're new to Clojure, or functional programming, or languages that have a REPL, I hope this encourages you to crack open a REPL and start to think about your own story. It's a means to whatever end you have in mind. "
and even points to a super general google search.
https://www.google.de/search?client=safari&rls=en&q=repl+dri...
Did you actually read the thing, or just open it close it and decide to hat it because it not CL?
> Did you actually read the thing, or just open it close it and decide to hat it because it not CL?
The author could benefit from some of the better REPLs of Common Lisp - which for example nicely integrate various tools (inspectors, debuggers, error handling, object-oriented programming, ...) to better support interactive/exploratory programming.
The author could benefit from some of the better REPLs of Common Lisp - which for example nicely integrate various tools (inspectors, debuggers, error handling, object-oriented programming, ...) to better support interactive/exploratory programming.
Can it run Lisp code?
Which lisp?
The one that was painfully standardized to avoid this kind of question?
"The Lisp family of languages" vs "Lisp" is an old discussion: see http://lisp-univ-etc.blogspot.fr/2013/01/common-lisp-is-just... for a summary.
"The Lisp family of languages" vs "Lisp" is an old discussion: see http://lisp-univ-etc.blogspot.fr/2013/01/common-lisp-is-just... for a summary.
Ah so scheme then. Fair enough, scheme is probably the most worthy of the title. It's both true to McCarthys mathmatical spirit, and he himself stated that Steele is probably the closest thing to a benevolent dictator in the lisp world.
Steele hasn't edited the Scheme standard since two or three decades.
Ever wondered why Scheme is called Scheme and not LexicalLisp?
It's a new language, with it's own dialects, standards, libraries, implementations, communities, ...
Lately Steele worked on languages like Java and Fortress. Nothing with Lisp...
Ever wondered why Scheme is called Scheme and not LexicalLisp?
It's a new language, with it's own dialects, standards, libraries, implementations, communities, ...
Lately Steele worked on languages like Java and Fortress. Nothing with Lisp...
McCarthy's Lisp.
http://www.softwarepreservation.org/projects/LISP/lisp15_fam...
Its core lives in every Lisp.
http://www.softwarepreservation.org/projects/LISP/lisp15_fam...
Its core lives in every Lisp.
Fair enough, but then no lisp in use today is lisp.
Its core lives in Lisp dialects like Emacs Lisp just fine.
Try GNU Emacs and the REPL:
Try GNU Emacs and the REPL:
M-x ielm
*** Welcome to IELM *** Type (describe-mode) for help.
ELISP> (append '(this is a Lisp) '(REPL))
(this is a Lisp REPL)
ELISP> (cons 'This (append '(is a) (list 'Lisp 'REPL)))
(This is a Lisp REPL)
CL-USER 6 > (defun my-length (l)
(prog (u v)
(setq v 0)
(setq u l)
a
(cond ((null u) (return v)))
(setq u (cdr u))
(setq v (+ v 1))
(go a)))
MY-LENGTH
CL-USER 7 > (my-length '(1 2 3 4 5))
5
Please tell me RET is a backronym for return like you'd hit when you've finished a line in a REPL ;)
Gosh, the color of the sidebar really hurts.. Am I the only one?
Nope, it's awful. I use this chrome extension called "reader mode": https://chrome.google.com/webstore/detail/read-mode/nagcaaho...
[0] http://geiser.nongnu.org/geiser_1.html#Introduction