Path: csiph.com!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail
From: Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups: comp.lang.javascript
Subject: Re: library for fast map/filter/reduce
Date: Sat, 20 Feb 2016 13:59:42 +0000
Organization: A noiseless patient Spider
Lines: 24
Message-ID: <87lh6f32k1.fsf@bsb.me.uk>
References: <9f70cd71-da91-478c-ac97-392fcb7c7a63@googlegroups.com> <8e0eb84d-66c8-41da-847b-759f634bc4cd@googlegroups.com> <286742ed-e3f3-466f-9b4d-b9deb5bb4442@googlegroups.com> <f9863dd4-3361-4fc6-ab37-808b4222887a@googlegroups.com> <56e25c80-9c8e-4113-a6ad-07d7c321b5db@googlegroups.com>
Mime-Version: 1.0
Content-Type: text/plain
Injection-Info: mx02.eternal-september.org; posting-host="017616aa25f81ec581c44d76d61ba2f3"; logging-data="23227"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1+rcL80iYS7neD7g6ejGsTn//F4+mxbTIc="
Cancel-Lock: sha1:9lX5ouwXRjExgbQWs4mGKclQp7k= sha1:4RIjSZ1Gt51ICrfVQhdY/6mCuFM=
X-BSB-Auth: 1.9595ed615304c78de9f5.20160220135942GMT.87lh6f32k1.fsf@bsb.me.uk
Xref: csiph.com comp.lang.javascript:29642

glathoud <glathoud@yahoo.fr> writes:
<snip>
> Side note about lambdas: it would be nice to be able to write some
> without variables at all. OCaml has an interesting notation where one
> can wrap an operator + into a function (+)

Haskell has that too, and it came (at least in the case of Haskell),
from Miranda designed by David Turner.  He may have got it from a 1973
dissertation by Wile and (like so many such things) it probably has even
older roots in mathematical logic.

Haskell (and Miranda) can go both ways.  (+) is a function make from an
operator, but given a function like mod, you can make an operator from
it using `...`:

  95 `mod` 10

is 5.  And you can combine the two.  Since operators permit sections
using either operand it can be handy to write (`mod` 10) for the "modulo
10" function.

<snip>
-- 
Ben.