workspace
stringclasses 4
values | channel
stringclasses 4
values | text
stringlengths 1
3.93k
| ts
stringlengths 26
26
| user
stringlengths 2
11
|
|---|---|---|---|---|
elmlang | general | yeah true | 2019-01-29T04:18:58.198900 | Nana |
elmlang | general | I dream of an Elm with Lisp-like powers, where you can evaluate Elm expressions within a running Elm program. | 2019-01-29T04:19:07.199100 | Dorsey |
elmlang | general | Ah, the source code is here: <https://github.com/girishso/elm-repl-in-browser> | 2019-01-29T04:22:20.199400 | Dorsey |
elmlang | general | As I thought, it's connecting to REPL running in a container. Not ideal, but I guess good enough. | 2019-01-29T04:23:05.199600 | Dorsey |
elmlang | general | Ellie also compiles server-side. The 0.19 compiler does tricks for efficiency which GHCJS can't handle. | 2019-01-29T04:47:14.199900 | Huong |
elmlang | general | Oh, I see. Thanks. | 2019-01-29T04:47:35.200100 | Dorsey |
elmlang | general | does anyone have a glue why the linear-algebra package does provide `add`, `sub` for vectors, but not `div` and `mul`? Am I missing something here? | 2019-01-29T04:50:23.201800 | Earnestine |
elmlang | general | There is a reason why there is no vector division: <https://physics.stackexchange.com/questions/111652/can-we-divide-two-vectors> | 2019-01-29T04:52:16.201900 | Antonette |
elmlang | general | As for the products, all the products you need are there. | 2019-01-29T04:52:31.202200 | Antonette |
elmlang | general | <https://package.elm-lang.org/packages/elm-explorations/linear-algebra/latest/Math-Vector2#scale> | 2019-01-29T04:52:59.202400 | Antonette |
elmlang | general | (product with a scalar ; if you want to divide by said scalar, you can scale by a fraction) | 2019-01-29T04:54:05.202600 | Antonette |
elmlang | general | <https://package.elm-lang.org/packages/elm-explorations/linear-algebra/latest/Math-Vector2#dot> | 2019-01-29T04:54:14.202800 | Antonette |
elmlang | general | :point_up_2: And if you want to multiply two vectors between one another, there's the dot product. | 2019-01-29T04:56:01.203000 | Antonette |
elmlang | general | :slightly_smiling_face: | 2019-01-29T04:56:03.203200 | Antonette |
elmlang | general | (does it answer your question?) | 2019-01-29T04:56:56.203400 | Antonette |
elmlang | general | wait... I'll respond in a sec | 2019-01-29T05:00:30.203600 | Earnestine |
elmlang | general | related: <https://github.com/elm/projects#in-browser-repl> | 2019-01-29T05:02:21.203800 | Velia |
elmlang | general | :slightly_smiling_face: | 2019-01-29T05:03:17.204000 | Antonette |
elmlang | general | Nice link. Thanks. | 2019-01-29T05:04:02.204200 | Dorsey |
elmlang | general | Ok, I see. I already assumed there's a reason. But in practice, how would you do this:
```
mousePos : Vec2
resolution : Vec2
normalizedMousePos : Vec2
normalizedMousePos = ?
```
of course, I can write a helper:
```
v2div : Vec2 -> Vec2 -> Vec2
v2div v1 v2 =
vec2 (V2.getX v1 / V2.getX v2) (V2.getY v1 / V2.getY v2)
```
and then say:
```
normalizedMousePos = v2div mousePos resoltution
```
but maybe there's a better way.. | 2019-01-29T05:07:46.204400 | Earnestine |
elmlang | general | Well, there is :slightly_smiling_face: | 2019-01-29T05:17:54.204800 | Antonette |
elmlang | general | cool, looking forward to hear... | 2019-01-29T05:18:34.205000 | Earnestine |
elmlang | general | (or maybe not ; I'm not sure ; just a sec) | 2019-01-29T05:18:55.205200 | Antonette |
elmlang | general | Maybe I wouldn't use `normalize` in the name ; `normalize` already exists and consists in turning a vector of arbitrary length into a unit vector (length == 1) without changing its angle. | 2019-01-29T05:20:08.205400 | Antonette |
elmlang | general | Except for that, your v2div function is fine if that's what you want to achieve (i.e. having a vector representing the coordinates of the mouse relative to the screen width and height). | 2019-01-29T05:21:20.205600 | Antonette |
elmlang | general | I'm a little curious as to what you're trying to achieve with this, but if it makes sense in your situation, go for it :slightly_smiling_face: | 2019-01-29T05:22:01.205900 | Antonette |
elmlang | general | (and since there's no pre-built way to do this in the package, so there's no better way than your way as far as I know) | 2019-01-29T05:24:02.206100 | Antonette |
elmlang | general | Hello | 2019-01-29T05:24:21.206400 | Sadie |
elmlang | general | I am trying to port kallaspriit/elm-basic-auth to Elm 0.19 | 2019-01-29T05:24:35.206700 | Sadie |
elmlang | general | It is working up to the elm-test part <https://github.com/kallaspriit/elm-basic-auth/pull/2> | 2019-01-29T05:24:47.207100 | Sadie |
elmlang | general | As for the naming, maybe `relativeMousePos` would make more sense. | 2019-01-29T05:25:02.207200 | Antonette |
elmlang | general | When I run it I get:
```
elm-basic-auth$ elm-test
elm-test internal error: got an unexpected result from 'elm make' when validating transitive dependencies. Please report this at <https://github.com/rtfeldman/node-test-runner/issues>
``` | 2019-01-29T05:25:11.207600 | Sadie |
elmlang | general | If I try to run elm-make on the file I get
```
$ elm make tests/Tests.elm
-- UNKNOWN IMPORT ---------------------------------------------- tests/Tests.elm
The Tests module has a bad import:
import Test
I cannot find that module! Is there a typo in the module name?
When creating a package, all modules must live in the src/ directory.
``` | 2019-01-29T05:25:41.208000 | Sadie |
elmlang | general | I tried:
```
$ elm install elm-explorations/test
I found it in your elm.json file, but in the "test-dependencies" field.
Should I move it into "dependencies" for more general use? [Y/n]:
Dependencies loaded from local cache.
Dependencies ready!
rhubscher@NATIM-ThinkPad-T470s:~/elm/elm-basic-auth$ elm make tests/Tests.elm
Dependencies loaded from local cache.
Dependencies ready!
Success! Compiled 2 modules.
``` | 2019-01-29T05:26:16.208300 | Sadie |
elmlang | general | So I am a bit lost | 2019-01-29T05:26:22.208600 | Sadie |
elmlang | general | any idea ? | 2019-01-29T05:26:24.208800 | Sadie |
elmlang | general | you don't `make` your tests, you need the `elm-test` npm package. | 2019-01-29T05:50:40.209300 | Danika |
elmlang | general | <https://www.npmjs.com/package/elm-test> | 2019-01-29T05:51:09.209400 | Danika |
elmlang | general | This makes me think there's something funky with the elm.json or elm-stuff | 2019-01-29T06:09:01.209800 | Bert |
elmlang | general | Did you try removing elm-stuff and re-running elm-test? | 2019-01-29T06:09:29.210000 | Bert |
elmlang | general | That is what they are running (see the first code block) | 2019-01-29T06:10:45.210200 | Bert |
elmlang | general | Oh yeah, oops! | 2019-01-29T06:25:08.210400 | Danika |
elmlang | general | mhhh... this is a bit unconvenient... From other languages I'm used to have this functions.. Having a `map` function would not be bad as well... Maybe a `linear-algebra-extra` package would make sense (?) | 2019-01-29T06:29:07.210700 | Earnestine |
elmlang | general | Sure :slightly_smiling_face: you can even propose it if you like (and don't find it already existing of course). | 2019-01-29T06:30:15.210900 | Antonette |
elmlang | general | Also, it's possible to suggest a contribution to the existing package (through a pull request for example, maybe with an issue to start the conversation less abruptly). | 2019-01-29T06:31:20.211100 | Antonette |
elmlang | general | But before that, there's nothing wrong with creating these functions in the scope of your project (they'll even give you the basic code if you want to send a PR or something). | 2019-01-29T06:32:00.211300 | Antonette |
elmlang | general | jepp, also possible... | 2019-01-29T06:32:08.211500 | Earnestine |
elmlang | general | or is there maybe a way to archive the thing by using the Matrix module from the package? | 2019-01-29T06:32:43.211700 | Earnestine |
elmlang | general | I would start there if I were you, if only to get familiar with it. | 2019-01-29T06:33:32.211900 | Antonette |
elmlang | general | Hi, I am using this package <https://package.elm-lang.org/packages/elm/browser/latest/Browser-Events> to grab onMouseMove events | 2019-01-29T06:57:44.213300 | Cameron |
elmlang | general | but I would like to get position information and there is no documentation in the module's documentation on how is it possible to get position information out of the onMouseMoveEvent for example | 2019-01-29T06:58:56.214600 | Cameron |
elmlang | general | anybody got any idea ? | 2019-01-29T06:59:00.214800 | Cameron |
elmlang | general | <@Cameron> the idea of that API is that you provide a `Json.Decode.Decoder` that can grab the values you're interested in from the event object. | 2019-01-29T07:00:36.216500 | Earlean |
elmlang | general | <https://developer.mozilla.org/en-US/docs/Web/Events/mousemove> is the documentation for the DOM mousemove event | 2019-01-29T07:01:29.217800 | Earlean |
elmlang | general | <@Earlean> thanks for your response but it's wird because to decode the values I need to now how the Java script event object looks like | 2019-01-29T07:01:36.218100 | Cameron |
elmlang | general | Oh now I get it | 2019-01-29T07:02:20.218700 | Cameron |
elmlang | general | <@Cameron> easiest is to just type `addEventListener("click", console.log)` in the console :wink: | 2019-01-29T07:07:11.220100 | Nana |
elmlang | general | then you can just click on stuff and inspect the event object | 2019-01-29T07:07:39.220500 | Nana |
elmlang | general | <@Nana> I think I am going to start with this aproach to get a better feeling thanks really apriciate your help | 2019-01-29T07:08:50.221600 | Cameron |
elmlang | general | How often do you all pick apart the `(model, cmd)` return pair once constructed? | 2019-01-29T08:20:40.226400 | Saran |
elmlang | general | Seldom | 2019-01-29T08:21:21.226600 | Lynne |
elmlang | general | Hey Folks! What's your go-to style for conditionally append items to a list?
something like
```
case (a. b) of
(False, False) -> [ a, b, c ]
(False, True) -> [ a, b, c, y ]
(True, False) -> [ a, b, c, y ]
(True, True) -> [ a, b, c, x, y]
```
I usually if/case with the different lists, but that may lead to a lot of duplication for the common static element of the lists;
I saw people having a list of `(Boolean, A)` or `Maybe A` and then call `List.filter`. What do you use? :slightly_smiling_face: | 2019-01-29T11:40:43.237400 | Lilli |
elmlang | general | I'd go for list of maybes | 2019-01-29T11:41:29.237800 | Kris |
elmlang | general | Hey <@Lilli> :slightly_smiling_face: I usually go for the `List (Maybe a)` (usually more readable imo) ; you may want to use `Maybe.Extra.values : List (Maybe a) -> List a` that does pretty much what you would expect from its type signature. | 2019-01-29T11:46:26.239600 | Antonette |
elmlang | general | <https://package.elm-lang.org/packages/elm-community/maybe-extra/latest/Maybe-Extra#values> | 2019-01-29T11:48:44.241200 | Antonette |
elmlang | general | <@Antonette> yea, i don't use it much because when you have a lot of common items you just end with too many "Just", in my example `[a, b, c]` are always there. But there are cases where it's super convenient and easy to read aswell | 2019-01-29T11:49:28.241700 | Lilli |
elmlang | general | The way I do it to avoid clutter is like:
```
[ somethingAlwaysThere |> Just
, somethingAlsoAlwaysThere |> Just
, somethingOptional
]
``` | 2019-01-29T11:50:53.243100 | Antonette |
elmlang | general | <@Lilli> wow I don't understand what that's supposed to do at all :sweat_smile: | 2019-01-29T11:51:02.243300 | Nana |
elmlang | general | that alone won't do anything :smile: it's just a matter of coding style | 2019-01-29T11:52:08.243400 | Lilli |
elmlang | general | that's cute actually :smile: | 2019-01-29T11:52:35.243600 | Lilli |
elmlang | general | ah I think I get it now, so would you do like that if you wanted do conditionally show an element, or conditionally add a style? | 2019-01-29T11:54:42.243800 | Nana |
elmlang | general | yea, conditionally show elements, add classes, add rows to a table. Those are all possible applications | 2019-01-29T11:56:15.244000 | Lilli |
elmlang | general | yeah it's tricky to make that look neat, often ends up messy | 2019-01-29T11:57:19.244200 | Nana |
elmlang | general | The cutest I ever came up with in that situation :wink: | 2019-01-29T11:58:09.245000 | Antonette |
elmlang | general | I also do `List (Maybe a)` w/ filtermap, but you could also do something like
```
let extras = if List.all identity [a,b] then [x, y] else if List.any identity [a,b] then [y] else []
in [a,b,c] ++ extras
```
Or even just filtermap the optionals and append them | 2019-01-29T12:00:16.247500 | Earnest |
elmlang | general | I usually do something like
```
[a, b, c]
++ (if something then
[x, y]
else
[]
)
``` | 2019-01-29T12:00:55.248300 | Nana |
elmlang | general | I did that for a while, but I find it less readable most of the times. | 2019-01-29T12:01:02.248400 | Antonette |
elmlang | general | Aaaaand that is pretty ugly, no offense. | 2019-01-29T12:01:23.248600 | Antonette |
elmlang | general | yes it is :laughing: | 2019-01-29T12:01:45.248800 | Nana |
elmlang | general | the thing [a,b,c] ++ extra ends up messy when the contidion if no straight forward. At least in my experience :smile: | 2019-01-29T12:02:52.249000 | Lilli |
elmlang | general | Yep. Even worse when you want the extra to appear at specific points. Even worse when there are lots of them. | 2019-01-29T12:05:38.250300 | Antonette |
elmlang | general | At that point I'd start writing functions that handle the conditional testing or switch to Maybe | 2019-01-29T12:06:09.251000 | Earnest |
elmlang | general | And yeah if you need optional things in arbitrary positions instead of beginning or end, just use the filterMap | 2019-01-29T12:06:34.251600 | Earnest |
elmlang | general | sometimes i also do something like this
```
[ (a, True)
, (b, True)
, (c, True)
, (x, #someCondition)
, (y, #someOtherCondition)
] |> filterMap filterHelper
```
This way it's easy to read when things should be there or not | 2019-01-29T12:07:32.253300 | Lilli |
elmlang | general | for html nodes in particular I have this function though:
```
nodeIf : Bool -> Html msg -> Html msg
nodeIf condition ifTrue =
if condition then
ifTrue
else
text ""
```
it's kinda nice I think | 2019-01-29T12:07:49.253700 | Nana |
elmlang | general | You can also do `|> List.filter Tuple.second |> List.map Tupel.first` instead of writing `filterHelper` | 2019-01-29T12:09:08.255100 | Earnest |
elmlang | general | so you can just do:
```
div []
[ text "hello"
, text "world"
, nodeIf model.show (text "foo")
]
``` | 2019-01-29T12:09:22.255600 | Nana |
elmlang | general | Yeah that's common, also a `nodeMaybe : Maybe a -> (a -> Html msg) -> Html msg` | 2019-01-29T12:09:39.256000 | Earnest |
elmlang | general | in this case you can have a neutral element `text ""` but sometimes there is no such element :sweat_smile: but yea, this is the same approach of Maybe X, where the neutral element is Nothing | 2019-01-29T12:10:06.256200 | Lilli |
elmlang | general | Looks pretty ok too :slightly_smiling_face: | 2019-01-29T12:10:43.256900 | Antonette |
elmlang | general | I've been thinking, I wonder if it'd be neater if html node/attribute lists were trees instead of lists, which were automatically flattened in the end | 2019-01-29T12:11:05.257400 | Nana |
elmlang | general | or if Elm had a "list spread operator" like `...` in JavaScript | 2019-01-29T12:11:59.258100 | Nana |
elmlang | general | a list spread operator would be pretty nice I think! | 2019-01-29T12:12:46.258400 | Nana |
elmlang | general | I'm not a fan of "polluting" the dom tree with useless nodes ; at least the `List (Maybe a)` doesn't introduce long-living `Nothing` elements in a deep structure. | 2019-01-29T12:12:53.258500 | Antonette |
elmlang | general | Still, if there was a value that says "this is technically an `Html msg` but don't put it in the dom tree please" I'd rather use that than a `List (Maybe a)`. | 2019-01-29T12:14:48.260300 | Antonette |
elmlang | general | (like an `Hml.none` or something) | 2019-01-29T12:15:15.261100 | Antonette |
elmlang | general | <@Rutha> never thought of that. So far i never encountered a situation where a tree would be clearer to read compared to a list | 2019-01-29T12:15:16.261300 | Lilli |
elmlang | general | then you could do:
```
[ a
, b
, c
, ... (if condition then
[x, y]
else []
)
]
``` | 2019-01-29T12:15:26.261500 | Nana |
elmlang | general | Hmm. That's a great feature to have actually. | 2019-01-29T12:15:55.262300 | Antonette |
elmlang | general | nodes _are_ trees :slightly_smiling_face: | 2019-01-29T12:16:27.264100 | Carman |
Subsets and Splits
No saved queries yet
Save your SQL queries to embed, download, and access them later. Queries will appear here once saved.