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elmlang | general | <@Virgie> thanks | 2019-01-02T17:35:56.463500 | Earleen |
elmlang | general | Thanks! I tried having signatures of both `(a -> Msg)` and `(String -> msg)`; but the compiler warned me:
```
Hint: Your type annotation uses type variable `msg` which means ANY type of
value can flow through, but your code is saying it specifically wants a `Msg`
value. Maybe change your type annotation to be more specific? Maybe change the
code to be more general?
```
then I tried `(String -> msg) -> Cmd msg` and this passed; I see how this could be more useful | 2019-01-02T17:39:27.464200 | Su |
elmlang | general | Greetings, all. I’m having issues with `elm/time`. I’m trying to use `Time.Month` like so: | 2019-01-02T21:18:18.465800 | Hien |
elmlang | general | ```
import Time exposing (Month)
daysInMonth : Month -> List Int
daysInMonth month =
case month of
Jan ->
List.range 1 31
Feb ->
List.range 1 28
Mar ->
List.range 1 31
Apr ->
List.range 1 30
May ->
List.range 1 31
Jun ->
List.range 1 30
Jul ->
List.range 1 31
Aug ->
List.range 1 31
Sep ->
List.range 1 30
Oct ->
List.range 1 31
Nov ->
List.range 1 30
Dec ->
List.range 1 31
``` | 2019-01-02T21:18:19.466000 | Hien |
elmlang | general | I’m getting an error for every month similar to this: | 2019-01-02T21:18:41.466300 | Hien |
elmlang | general | ```I cannot find a `Dec` constructor:
117| Dec ->
^^^
These names seem close though:
EQ
Err
GT
LT``` | 2019-01-02T21:18:44.466500 | Hien |
elmlang | general | Can someone give me a pointer to what I’m doing wrong? | 2019-01-02T21:18:52.466800 | Hien |
elmlang | general | I thought these types were importable and usable as shown in the docs. | 2019-01-02T21:19:11.467200 | Hien |
elmlang | general | <https://package.elm-lang.org/packages/elm/time/latest/Time> | 2019-01-02T21:19:15.467400 | Hien |
elmlang | general | I know I’m not handling leap years yet. This is my first implementation and I’m trying to populate a dropdown. | 2019-01-02T21:19:57.467500 | Hien |
elmlang | general | `import Time exposing (Month (..))` | 2019-01-02T21:21:13.468000 | Rebekah |
elmlang | general | You are importing the Month type from the Time module, without it's type constructors (Jan, Feb, Mar, ...) | 2019-01-02T21:21:48.468300 | Rebekah |
elmlang | general | Oh geez. Thank you. I didn’t see an example in the docs. | 2019-01-02T21:30:20.468600 | Hien |
elmlang | general | It that the only way to use it? | 2019-01-02T21:30:25.468800 | Hien |
elmlang | general | I can’t do `Month.Jan`, can I? | 2019-01-02T21:30:34.469000 | Hien |
elmlang | general | Is there any other way to use it without the `(..)` import? | 2019-01-02T21:31:39.469200 | Hien |
elmlang | general | I tried `Month.Jan` but it didn’t work. While I’m sure there’s a good reason, I just don’t know what it is. (yet) | 2019-01-02T21:41:49.469400 | Hien |
elmlang | general | admin note: since some of these messages were deleted, and they're just noise, I'm just gonna delete all of them. For people coming into this later: it was just someone being disruptive. Carry on :slightly_smiling_face: | 2019-01-02T21:56:55.480700 | Georgene |
elmlang | general | <@Hien> `Time.Jan` | 2019-01-02T21:58:36.483200 | Earlean |
elmlang | general | <@Georgene> Feel free to delete my last comment, too. :slightly_smiling_face: | 2019-01-02T21:58:39.483500 | Hien |
elmlang | general | alright, done. Wasn't sure if that was part of the prior conversation :slightly_smiling_face: | 2019-01-02T21:59:06.483700 | Georgene |
elmlang | general | <@Earlean> Oh, so each “variant” of that type is attached directly to time. Interesting. | 2019-01-02T21:59:27.483900 | Hien |
elmlang | general | Thanks <@Earlean> and <@Rebekah>! | 2019-01-02T21:59:40.484300 | Hien |
elmlang | general | Thanks! It was part of my question but was useless. I was concerned that my lengthy post was basic enough to be in <#C192T0Q1E|beginners> rather than here. | 2019-01-02T22:00:16.484500 | Hien |
elmlang | general | there's not a really deep distinction. If you feel like moving it, feel free. Otherwise here is fine! | 2019-01-02T22:00:50.484700 | Georgene |
elmlang | general | I thought using unsafePerformIO was as controversial as functional programming could get, guess I was wrong :grimacing: | 2019-01-02T22:02:29.485600 | Rosanne |
elmlang | general | Someone dm me what the argument was about I missed it | 2019-01-02T22:28:37.486300 | Mozella |
elmlang | general | also, has anyone used any of the available xml parsing modules? | 2019-01-02T22:30:00.487400 | Mozella |
elmlang | general | I'm a bit lost on how to decode stuff | 2019-01-02T22:30:17.487800 | Mozella |
elmlang | general | No worries. I've built (another) calendar widget (elm-ui based) with a simple core API. I'm planning to open source in the next few weeks. | 2019-01-02T22:35:39.489700 | Leoma |
elmlang | general | ```The elm.json for elm-community/list-extra 1.0.0 gotcorrupted somehow.
I removed it from my file cache, so if it was some transient error it should be
fixed if you try the same thing again. Please report this if it seems like an
Elm problem though!```
This is not the first time i've got this message when trying to install a package with `elm install`, any ideas? | 2019-01-03T03:37:16.490800 | Danika |
elmlang | general | <@Danika> try deleting elm-stuff folder | 2019-01-03T06:10:34.491600 | Sherri |
elmlang | general | No such like, I've tried that before. I believe this is some sort of dependency issue with a non-helpful error. The latest version of list extra is 8.1.0...
On some further investigation it looks like I was triyng to install an old package (`NoRedInk/elm-decode-pipeline`) when a newer version (`NoRedInk/elm-json-decode-pipeline`) exists. Frustrating to say the least but at least it works now. | 2019-01-03T06:35:40.494900 | Danika |
elmlang | general | <@Leoma> neat! | 2019-01-03T09:37:47.495200 | Michelle |
elmlang | general | if you'll excuse my curiosity, what happened? | 2019-01-03T09:38:23.495400 | Emilee |
elmlang | general | just technical difficulties. One person pinged a lot of people at once (seemed like an accident.) One of the people who was pinged reacted disruptively. | 2019-01-03T09:41:36.495700 | Georgene |
elmlang | general | for full transparency: we didn't have full-Slack pings turned off for whatever reason. Now they're fixed so the cause should not happen again. :slightly_smiling_face: | 2019-01-03T09:42:18.495900 | Georgene |
elmlang | general | i see, thanks for the reply :slightly_smiling_face: | 2019-01-03T09:42:37.496100 | Emilee |
elmlang | general | (not sure what's the policy on announcements here, but I'll post it anyway)
Using Nix to deploy Elm application: <https://blog.hercules-ci.com/elm/2019/01/03/elm2nix-0.1/> | 2019-01-03T10:47:17.497100 | Zachary |
elmlang | general | there is the <#C0K384K4Y|news-and-links> channel | 2019-01-03T10:47:55.497700 | Virgie |
elmlang | general | yeah, share it in <#C0K384K4Y|news-and-links> too! | 2019-01-03T10:48:23.498000 | Lashawnda |
elmlang | general | thanks! :slightly_smiling_face: | 2019-01-03T10:49:53.498200 | Zachary |
elmlang | general | Anyone know whats wrong with this Regex | 2019-01-03T11:01:08.498800 | Lecia |
elmlang | general | ```
protocolExp =
Regex.regex "^https?\:\/\/"
``` | 2019-01-03T11:01:11.499000 | Lecia |
elmlang | general | compiler says | 2019-01-03T11:01:21.499200 | Lecia |
elmlang | general | ```
(line 1, column 10): unexpected ":" expecting space, "&" or escape code
62| Regex.regex "^https?\:\/\/"
^
Maybe <http://elm-lang.org/docs/syntax> can help you figure it out.
``` | 2019-01-03T11:01:24.499400 | Lecia |
elmlang | general | Perhaps colons don’t require escaping | 2019-01-03T11:03:05.499900 | Kris |
elmlang | general | this looks like maybe it's 0.18? | 2019-01-03T11:05:20.500200 | Georgene |
elmlang | general | regardless: yeah, colons and forward slashes don't need escaping. | 2019-01-03T11:05:48.500700 | Georgene |
elmlang | general | if you want a literal backslash use `\\` | 2019-01-03T11:06:10.501000 | Georgene |
elmlang | general | ah cool, thanks | 2019-01-03T11:07:41.501200 | Lecia |
elmlang | general | Does anyone have enough experience with the `composable-form` package to know how to make a custom field to just display a paragraph of text? | 2019-01-03T11:17:04.501900 | Hyacinth |
elmlang | general | You want a `<textarea>` ? | 2019-01-03T11:17:37.502200 | Carman |
elmlang | general | Just a block of text for description purposes between fields. | 2019-01-03T11:17:55.502600 | Hyacinth |
elmlang | general | Is it tied to a particular field? Or perhaps to a sub-form? | 2019-01-03T11:18:34.503200 | Carman |
elmlang | general | To a sub-form maybe. I'm making a multi-page wizard for helping new customers set up their accounts. Currently each page is a separate form to be able to send a request to save the data with each step. Most of the time keeping the description text outside of the form works fine, but sometimes for design purposes it would be nice to have be able to have an arbitrary number of paragraphs of text within the form itseld. | 2019-01-03T11:21:12.505700 | Hyacinth |
elmlang | general | I suppose that for the most part it would work just fine to include an optional description text to any field. | 2019-01-03T11:22:25.506300 | Hyacinth |
elmlang | general | I have a `User` record with `firstName` and `lastName`. Both are of type `Maybe String`. What's the best way to say "if firstName isn't Nothing and lastName isn't Nothing then"? | 2019-01-03T14:33:22.509600 | Marcus |
elmlang | general | You have a function that needs both the first and last name strings? | 2019-01-03T14:33:55.509900 | Carman |
elmlang | general | Yes, exactly correct. | 2019-01-03T14:34:56.510400 | Marcus |
elmlang | general | If either is Nothing, then I won't display them. Only if both are present do they get shown. | 2019-01-03T14:35:27.511600 | Marcus |
elmlang | general | You can do something like:
```
Maybe.map2 yourFunction user.firstName user.lastName
``` | 2019-01-03T14:35:36.511800 | Carman |
elmlang | general | This will either return `Just outputOfYourFunction` or `Nothing` | 2019-01-03T14:36:07.512300 | Carman |
elmlang | general | Cool. I imagine the type annotation of `yourFunction` would look something like `yourFunction : String -> String -> String`, assuming the output is the two strings concatenated together. | 2019-01-03T14:38:16.513800 | Marcus |
elmlang | general | Correct | 2019-01-03T14:38:35.514100 | Carman |
elmlang | general | Thanks for your help. | 2019-01-03T14:38:56.514300 | Marcus |
elmlang | general | Glad to help! :slightly_smiling_face: | 2019-01-03T14:39:23.514600 | Carman |
elmlang | general | You may find these articles on the topic useful:
• <https://robots.thoughtbot.com/maybe-mechanics>
• <https://robots.thoughtbot.com/problem-solving-with-maybe>
• <https://robots.thoughtbot.com/two-ways-of-looking-at-map-functions> | 2019-01-03T14:40:07.515200 | Carman |
elmlang | general | Hi everyone and happy new year! If you missed it last month, we’re excited to announce Elm in the Spring, a new one-day single-track conference for developers interested in Elm! Join us in Chicago on April 26th, 2019 for a great day of learning, teaching, and community. <https://www.elminthespring.org> | 2019-01-03T17:02:48.516400 | Melodee |
elmlang | general | Our CFP is open — if you have an idea or story you want to share with the Elm community, we’d love to hear what you have to say! :grinning: | 2019-01-03T17:03:14.517100 | Melodee |
elmlang | general | Hi everyone! Does anyone know whether the 0.19 elm/random module supersedes the elm-random-extended-pcg library? I'm trying to figure out a way forward for <https://github.com/danyx23/elm-uuid/issues/10> | 2019-01-03T20:14:39.518400 | Kimiko |
elmlang | general | Never mind, I think the answer is "no, it doesn't" | 2019-01-03T20:40:25.518800 | Kimiko |
elmlang | general | I'm trying out the navbar in rundis/elm-bootstrap. It looks a little weird and fails to collapse. I'm using elm 0.19. Same thing when I try this example <http://elm-bootstrap.info/getting-started> Anyone who tried this? | 2019-01-04T03:10:05.519200 | Arie |
elmlang | general | <@Arie> Do you have the navbar subscriptions enabled in your app? Have you linked to the (correct) bootstrap CSS? Those are just questions off the top of my head. People in <#C3U2E3JRX|elm-bootstrap> might know more. | 2019-01-04T03:20:37.521300 | Jin |
elmlang | general | <@Jin> I have the navbar subscription. I have not linked the bootstrap CSS, can you give any hint on how to do so? | 2019-01-04T03:31:40.522600 | Arie |
elmlang | general | As mentioned in the linked guide you could use `Bootstrap.CDN.stylesheet` to create an inline style node. This works, also in `elm reactor`, but is not meant to be used for serious applications. There you could link to a hosted CSS via a normal link tag in your Html file, `<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">`. Or, if you have some build tooling in place, you could add the CSS as a dependency and import and build it like your other CSS. | 2019-01-04T03:36:10.526400 | Jin |
elmlang | general | <@Jin> You pointed me in the right direction and it work perfectly! Thank you. | 2019-01-04T03:52:38.527200 | Arie |
elmlang | general | Hey folks. I think I know the answer to my question but there is a chance I am missing something. Say I have a list of rose trees where each node contains an object of the same type. I would like to work with this "forest" as if it is a rose tree to use zipper etc. This is easily achievable by catering some root item which would be a non-meaningful value of the same type which all trees are using. But that's what I would like to avoid. Is there any way to model it somehow? | 2019-01-04T10:10:43.531200 | Lynne |
elmlang | general | What about a list zipper over a list of tree zippers | 2019-01-04T10:35:59.531800 | Lashawnda |
elmlang | general | I won't be able to use library dedicated for rose trees then (like zwilias/elm-rosetree which I am currently adopting) | 2019-01-04T10:39:21.532800 | Lynne |
elmlang | general | I mean I won't be able to use to full power (like traversing "forward" to a next tree if there is no child which is exactly what I want) | 2019-01-04T10:41:06.533700 | Lynne |
elmlang | general | I didn’t quite understand what you wanted | 2019-01-04T10:41:12.534000 | Kris |
elmlang | general | But I think it’s a zipper over the tree | 2019-01-04T10:41:23.534400 | Kris |
elmlang | general | Yes, with exception | 2019-01-04T10:41:37.534700 | Lynne |
elmlang | general | Root of this tree does not contain something which is contained within its descendants | 2019-01-04T10:42:10.535400 | Lynne |
elmlang | general | Imagine a `Tree (Maybe a)` where root is `Tree Nothing` but all children are always `Tree (Just a)` | 2019-01-04T10:42:41.536500 | Lynne |
elmlang | general | That's basically what I'd like to model | 2019-01-04T10:43:12.537000 | Lynne |
elmlang | general | Well, you should probably model it as something like `type MyThing a = Root Something (Tree a)` | 2019-01-04T10:44:15.538100 | Kris |
elmlang | general | That’s probably easier than trying to stuff it in the same type | 2019-01-04T10:44:44.538800 | Kris |
elmlang | general | Not sure I understand. Do you suggest using a type with single constructor where root would be `Root Something <no tree>` and every descendant `Root <nothing> <some tree>`? | 2019-01-04T10:47:26.540200 | Lynne |
elmlang | general | Is there any way to find out which github repos use a particular elm package? | 2019-01-04T16:26:53.543500 | Monte |
elmlang | general | hmm, maybe not bulletproof but how about something like <https://github.com/search?q=noredink%2Felm-json-decode-pipeline+filename%3Aelm.json&type=Code> | 2019-01-04T16:29:23.544200 | Alicia |
elmlang | general | That's a pretty interesting problem! | 2019-01-04T16:39:05.544400 | Huong |
elmlang | general | how would one build a heterogenous Dict-like (Hash-like, Map-like) data structure in Elm? ie, w/ homogenous (say, String keys) but w/ heterogenous values? | 2019-01-04T16:41:54.545900 | Nery |
elmlang | general | How heterogenous is it? If it’s just a small set of types, you could create a custom type that wraps those under one unified type. | 2019-01-04T16:42:45.546600 | Timika |
elmlang | general | ```type HValue
= StringValue String
| IntValue Int
| ArrayIntValue (Array Int)
``` for example. But you have to wrap and unwrap yourself. | 2019-01-04T16:44:32.548800 | Timika |
elmlang | general | ah nice
so, eg, `type Value = String | Int | Time` ?
but i suppose for more arbitrary number of types....
or is this the only viable way to achieve this | 2019-01-04T16:44:34.548900 | Nery |
elmlang | general | <@Alicia> thanks, more or less what I needed :smiley: | 2019-01-04T16:44:52.549300 | Monte |
elmlang | general | <@Timika> i see i have to have constructors | 2019-01-04T16:45:07.549800 | Nery |
elmlang | general | there is great value in other langs in "programming w/ maps" per se
should i not expect to get that kind of experience in Elm (strongly typed land)? | 2019-01-04T16:45:47.551200 | Nery |