Comment by jarpineh | Hacker News Reader

Comment by jarpineh | Hacker News Reader

This looks really interesting. I installed it easily through Brew. REPL seems to work fast.

Now if my Clojure flawored Lisp starter level knowledge could be somehow transformed into Erlang flawor...

I wrote this:

    > (map (lists:seq 1 10) (lambda (a) (io:format a)))

and this happened:

    #M((1 2 3 4 5 6 7 8 9 10) #Fun<lfe_eval.12.88887576>)

So, I'm not quite there yet. Hopefully somebody can make a Clojure to LFE comparison.

And using Elixir based things like Phoenix springs to mind...

Map is a constructor in this case. You'll want lists:map/2 (fn comes first). I don't know LFE much so there may be sugar of sorts for this, perhaps a comprehension syntax.

Yes, there are list comprehensions but they return the list of values:

(lc ((<- x (lists:seq 1 10))) (lfe_io:format "~p" x))

Thank you both. I didn't realize how Erlang flawored this really is. This did the trick:

    > (lists:map (lambda (a) (io:format (integer_to_list a))) (lists:seq 1 10))

Though all those OKs look kind of superfluous. I must read Erlang tutorial or two before I proceed.

io:format is a side-effecting function. It prints to the terminal. The atom ok is the return value.

If you want to create a list of strings, this works:

    > (lists:map (lambda (a) (lists:flatten (io_lib:format "~B" (list a)))) (lists:seq 1 10)).
    ("1" "2" "3" "4" "5" "6" "7" "8" "9" "10")

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