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Re: [PATCH] Gnu Elpa: stream.el: Add some more basic stream operations


From: Yuri Khan
Subject: Re: [PATCH] Gnu Elpa: stream.el: Add some more basic stream operations
Date: Sat, 17 Sep 2016 12:22:29 +0600

On Sat, Sep 17, 2016 at 6:52 AM, Michael Heerdegen
<address@hidden> wrote:

> For example, if stream
>
>   S = 0, 0, ..., 0, 1, 2, 3, ...
>
> We would want a function seq-X so that
>
>   (seq-X #'zerop S) == 0, 1, 2, ...
>
> I think that this function would be useful (I already needed it).  But
> what word sequence X would describe these semantics (how should we call
> the function)?

You’re right, drop-until is not a good match for this semantics. By
the way, how would you describe the required behavior without going
operational (mirroring the implementation)?



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