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Subject: Re: Function binders in Elisp?
Date: 18 Apr 2005 09:26:12 -0700
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PT wrote:
> For predicates I usually use lambda functions. For example:
>
>    (require 'cl)
>    (remove-if (lambda (x) (> x 2))
>               '(1 2 3 4))
>
> I'm not a lisp guru, therefore I often wonder if there are standard
binder
> functions in emacs lisp like for example bind2nd in C++ STL which
> transforms a binary function into an unary function:
>
>    find_if(L.begin(), L.end(), bind2nd(greater<int>(), 2)) // C++
>
> So that I can write something like this:
>
>    (remove-if (bind-second '< 2)
>               '(1 2 3 4))

So you are looking to do this?

(defmacro bind-second (first &rest others)
  `(lambda (x) (,first x ,@others)))

   (remove-if (bind-second > 2)
              '(1 2 3 4))

I'd think that would make the code a bit more confusing to read.
But maybe it's just me.