10:20 <magopian> hi, I'm having an issue this morning with "npm start", it was working fine yesterday, but I rebooted to have the latest osx version (0.13.1 instead of 0.13.0 I believe), and now i'm having https://dpaste.de/hP94

10:20 <magopian> does it ring a bell to anyone?

10:21 <magopian> i'm following https://jaredforsyth.com/2017/07/05/a-reason-react-tutorial/ and it worked perfectly yesterday

10:21 <reynir> -.-

10:21 <reynir> No idea, good luck magopian :/

10:22 <magopian> well, I'll find out eventually, thanks reynir ;)

10:23 <reynir> It's never been a pleasant experience for me dealing with errors from npm heh

10:24 <magopian> ok, removing the node_modules folder and doing a "npm install" again fixed it, go figure

10:24 <magopian> the good thing about npm errors is that they're often fixed by reinstalling :P

10:29 <reynir> heh

10:29 <reynir> The "have you tried turning it off and on again?" of package managers :P

10:31 <magopian> :P

10:33 <chenglou> @magopian you might have touched node_modules somehow in-between

10:33 <magopian> not on purpose, but maybe :P

10:33 <chenglou> ENOENT means doesn't exist

10:38 <magopian> oh, ok, thanks

10:38 <magopian> so somehow, something got erased, or moved

10:39 <chenglou> which version of npm are you on btw?

10:40 <magopian> 5.4.2

11:32 <chenglou> k, that one should be fine at least

12:56 <magopian> a question that might more be react related than reason(react) related: I'm following https://jaredforsyth.com/2017/07/05/a-reason-react-tutorial/ and at some point we add a "key" attribute to the components created in a List.map (specifically in https://jaredforsyth.com/2017/07/05/a-reason-react-tutorial/#18-tracking-ids-w-a-mutable-ref-)

12:57 <magopian> however, it seems the key isn't really used: it's passed as a "prop" to the TodoItem component, but then this component doesn't actually do anything with it (like adding a "key" attribute to the div ?)

12:58 <magopian> isn't it useful? Is it only in the virtual dom that it's used maybe, and so it doesn't need to end up in the DOM ?

22:38 <chenglou> @magopian ah, so that part requires a bit of prior ReactJS knowledge. `key` and `ref` are special "props" in ReactJS

22:38 <chenglou> https://reactjs.org/docs/lists-and-keys.html#keys