<div dir="auto">Yes, I think so. What about functions like length? length (repeat ()) is bottom. repeat () is not bottom. Ergo, length is partial. But I don't think we want to say that!</div><br><div class="gmail_quote"><div dir="ltr">On Thu, Aug 30, 2018, 10:05 PM Daniel Díaz Casanueva <<a href="mailto:dhelta.diaz@gmail.com">dhelta.diaz@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">+1 from me too. The partiality of a function seems to me like something that should be documented.<br><div><br></div><div>Best,</div><div>Daniel</div></div><br><div class="gmail_quote"><div dir="ltr">Am Fr., 31. Aug. 2018 um 02:10 Uhr schrieb Richard Eisenberg <<a href="mailto:rae@cs.brynmawr.edu" target="_blank" rel="noreferrer">rae@cs.brynmawr.edu</a>>:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Proposal: Mark partial functions in `base` as partial<br>
<br>
Motivation: I'm about to teach Haskell to a classful of beginners. In my experience, they will soon reach for functions like `head` and `tail`, because pattern-matching is foreign to them. I would love just to be able to say "Don't use partial functions", but many students will not easily be able to tell partial functions from total ones.<br>
<br>
I do expect this problem to work itself out rather quickly, and then students will be able to identify partial functions, but loudly marking partial functions as partial seems like a small service to everyone and a bigger one to newbies. I don't see any downsides.<br>
<br>
Thoughts?<br>
<br>
Thanks,<br>
Richard<br>
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