<div dir="auto"><div>Carter, I already showed that it is, and Dmitriy already refined that definition.<br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, May 9, 2019, 10:35 AM Carter Schonwald <<a href="mailto:carter.schonwald@gmail.com" target="_blank" rel="noreferrer">carter.schonwald@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><div><div dir="ltr">Its a complicated landscape, and we're still learning.<div><br></div><div>if a new combinator is hard to write:</div><div>a) how do we help educate folks into seeing it as an easy combinator</div><div>b) what are the with/without fusion cost models of different implementations?</div></div></div><div><div dir="ltr"><div>c) is it useful? </div><div dir="auto"><br></div><div dir="auto">I’m slightly inclined to support inclusion. </div><div dir="auto"><br></div><div dir="auto">One question I have is whether it’s definable via foldmap itself ?</div></div></div></div><div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 8, 2019 at 12:36 AM David Feuer <<a href="mailto:david.feuer@gmail.com" rel="noreferrer noreferrer" target="_blank">david.feuer@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 8, 2019, 12:12 AM Bryan Richter <<a href="mailto:b@chreekat.net" rel="noreferrer noreferrer" target="_blank">b@chreekat.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div>Hi David,</div><div dir="auto"><br></div><div dir="auto">At the risk of invoking the gods of Language Blorp, I will note that as a working programmer I know exactly what Applicative, Traversable, and Monoid are (from Vanessa's original proposal), but the unfortunately-named getAp is something I will only learn about begrudgingly.</div></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto">That seems unfortunate. Learning to use such types is pretty useful. I'd recommend that every Haskell programmer get to know all the types in Data.Monoid and come to an understanding of what they're good for.</div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div dir="auto"></div></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div dir="auto"><br></div><div dir="auto">What you consider "so simple we don't need to define it" took a rather lengthy email to describe. Are you sure it's not worth actually defining?</div></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto">So ... that long post was about trying to prove what I intuitively thought *must* be true. In the end, I wasn't quite able to finish the proof, but I did at least manage to convince myself that my intuition was correct. It's true that this sort of intuition takes a certain amount of time to develop. In the case of a really important operation, yeah, we should package it up. But is this operation important enough? I'm not really convinced yet.</div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div dir="auto"> If nothing else, the next time someone searches Hoogle for a function matching its type signature, perhaps it will be an opportunity for someone like me to peer beneath the hood and learn something new.</div></div></blockquote></div></div><div dir="auto"><br></div><div dir="auto">That's valid. But ... there are lots of opportunities for that sort of thing already. Is it worth the API clutter to add another one?</div></div>
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