Mike,

Could you link the StrangeLoop video ?

Geraldo 

On Thursday, February 26, 2015 at 9:55:29 PM UTC-3, Mike Thompson wrote:
> On Thursday, February 26, 2015 at 10:19:05 AM UTC+11, Jane Dampney wrote:
> > On Wednesday, February 25, 2015 at 10:52:23 PM UTC+11, Mike Thompson wrote:
> > > A Reagent Framework For Writing SPAs, in ClojureScript.
> > > 
> > > README and source code: https://github.com/Day8/re-frame
> > > 
> > > "Derived data, flowing" in a two-stage, FRP loop.
> > > 
> > > Absolutely no Cursors!!
> > > 
> > 
> > Wow!  No Cursors, indeed.
> > 
> > Really well thought out, and nicely explained. 
> > 
> > Appears similar to https://github.com/evancz/elm-architecture-tutorial
> > but not the same.  I like the use of middleware and love the possibility of 
> > using statecharts.
> 
> 
> 
> Indeed, Elm was an inspiration.  As was the terrific Hoplon, which doesn't 
> get nearly enough praise.
> 
> We all know that immutable data let's you manage "time" better, right? We're 
> able to ignore (isolate ourselves from) the effect of time on data.    
> 
> FRP is another dimension in the same process. FRP allows us to model the 
> "flow" of data over "time". It allows us to manage the process of producing 
> "Derived Data" (materialised views) over time.  Again, it is all about doing 
> the "time/data”  thing better. 
> 
> That was a big learning for me (I worry that everyone else already knows this 
> already, and I'm just very late to the party). 
> 
> Perhaps the biggest moment for me was seeing Pete Hunt (Facebook) talking at 
> reactconf. In his talk, he referenced a particular StrangeLoop video, 
> mentioning how it had had a big influence on the way Facebook looked at 
> things these days, and then he talked about how it was all about "Derived 
> Data". 
> 
> When I watched the video, a small nuclear explosion went off in the back of 
> mind. The penny suddenly dropped for me about FRP.
> 
> At that point, I suddenly understood what I had been trying to achieve with 
> re-frame, and why I found it so pleasing to work with. It all made sense.
> 
> The key thing for me is:  JUST. DON'T. USE. CURSORS. There I said it. They 
> appear convenient, I know. They are a way of achieving reference 
> transparency, I know.  But I think they are a “local optimum”.  Their use 
> seems to get in the way of a more important data flow paradigm and they seem 
> to encourage "control" into all the wrong places (components). At least 
> that's my experience (I did try to love them, really I did :-)).
> 
> I know this is a controversial opinion within ClojureScript right now. OM has 
> such an overwhelming mindshare. David is a very compelling and important 
> character.
> 
> Anyway, I'll finish off the todomvc over the weekend. That will make re-frame 
> a bit more real and easy to Grok.
> 
> --
> Mike

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