From: Nick Sieger <nicksieger@...>
Date: 2006-12-14T02:00:38+09:00
Subject: Re: join_with

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On 12/13/06, Nobuyoshi Nakada <nobu@ruby-lang.org> wrote:
>
> Hi,
>
> At Wed, 6 Dec 2006 19:40:03 +0900,
> Martin DeMello wrote in [ruby-talk:228380]:
> > While golfing with the hex_ip thread, I realised that map takes no
> > argument, and join takes no block, leaving a vacuum for a combined
> > method:
>
> Is it what is called "mapconcat" in Emacs Lisp?


I think that's what he's talking about, yes.

> mapconcat is a built-in function in `C source code'.
> (mapconcat FUNCTION SEQUENCE SEPARATOR)
>
> Apply FUNCTION to each element of SEQUENCE, and concat the results as
strings.
> In between each pair of results, stick in SEPARATOR.  Thus, " " as
> SEPARATOR results in spaces between the values returned by FUNCTION.
> SEQUENCE may be a list, a vector, a bool-vector, or a string.

Of course, in Ruby, FUNCTION == block arg and SEQUENCE == receiver.

/Nick

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