spencer/software_slacks · Datasets at Hugging Face

workspace stringclasses 4 values	channel stringclasses 4 values	text stringlengths 1 3.93k	ts stringlengths 26 26	user stringlengths 2 11
elmlang	general	Yeah I didn't have any luck implementing an animation	2019-02-07T16:33:58.081500	Karrie
elmlang	general	Eventually, after not finding a solution, I resorted to ports and JavaScript	2019-02-07T16:34:35.081700	Karrie
elmlang	general	Basically I have an outgoing port that will "tell" js that he needs to scroll down or up	2019-02-07T16:35:18.082100	Karrie
elmlang	general	You can pass all the parameters you want to the port, depending on your case	2019-02-07T16:35:41.082700	Karrie
elmlang	general	Tanks <@Earnest> i will look into this one.	2019-02-07T16:36:12.083400	Olene
elmlang	general	Thanks*	2019-02-07T16:36:21.083600	Olene
elmlang	general	its looks like there was Http.toTask in the 0.18 version. I wonder why it was removed. is it better to keep track of the different requests (used as partial steps) as part of the model (i.e. different Msg for different request) then using chaining task one after another and then create the final Msg (just want to know how to approach that problem without polluting the model too much)	2019-02-07T16:42:12.088000	Olene
elmlang	general	any talks to move elm to use webasm?	2019-02-07T16:59:46.088400	Lupita
elmlang	general	Yes. I think at least three of us have done little Elm to wasm projects, but I dont think anything has taken off.	2019-02-07T17:02:59.089100	Ashton
elmlang	general	i'm so super intrigued with elm. coming from vue, it's an interesting experience but still total noob	2019-02-07T17:10:58.089700	Lupita
elmlang	general	work in c# and omg i want to wring the necks of some of the devs who think functional is bad	2019-02-07T17:11:26.090300	Lupita
elmlang	general	was there a particular reason that elm uses currying?	2019-02-07T17:12:59.091500	Lupita
elmlang	general	Uh, I dont know. Good question. Elm looks a lot like Haskell, which also has partial application and currying. Seems like its just second nature to functional programming languages. So theres a lot of history there.	2019-02-07T17:14:36.092800	Ashton
elmlang	general	But, it is super useful.	2019-02-07T17:14:40.093000	Ashton
elmlang	general	I think.	2019-02-07T17:14:47.093200	Ashton
elmlang	general	i get it makes stuff like mapping easier	2019-02-07T17:15:34.094000	Lupita
elmlang	general	Currying leads to partially applying functions	2019-02-07T17:20:10.095100	Danika
elmlang	general	a poor mans dependency injection :slightly_smiling_face:	2019-02-07T17:22:25.095900	Lupita
elmlang	general	I think you’d offend a lot of people saying that ^^	2019-02-07T17:24:35.096800	Danika
elmlang	general	I gotta admit I got a bit riled up, but then decided one can think what one wants :)	2019-02-07T17:26:00.099200	Bert
elmlang	general	well not sure how else i would put it.	2019-02-07T17:26:04.099300	Lupita
elmlang	general	Curried functions is a mathematical concept that predates dependency injection	2019-02-07T17:26:30.100000	Danika
elmlang	general	ok so DI is an example of currying.	2019-02-07T17:27:38.100900	Lupita
elmlang	general	Currying (or partial application) is a function level thing. You apply some of the arguments of a function, but not all. That's it.	2019-02-07T17:29:36.103200	Bert
elmlang	general	You’re gonna offend just as many people equating currying to partial application :smirk:	2019-02-07T17:30:11.104400	Danika
elmlang	general	Not as many :smile:	2019-02-07T17:30:47.105000	Bert
elmlang	general	it's an interesting discussion but nothing to get offended about. i choose to look at it in practical terms	2019-02-07T17:32:40.106100	Lupita
elmlang	general	I dont think many here will be offended, and i think its silly to get all anal about it. But FP has its roots deeeeep in maths and academia and so you get a lot of people that take everything too seriously	2019-02-07T17:33:59.107800	Danika
elmlang	general	i get it. i'll tread lightly. really the only functional lang i've seen is erlang/exlixir before elm.	2019-02-07T17:35:02.108900	Lupita
elmlang	general	We dont mind here, we’re a fun bunch	2019-02-07T17:35:15.109700	Danika
elmlang	general	but makes sense when you see it done in js and then realize that's how all that redux is done	2019-02-07T17:35:37.110600	Lupita
elmlang	general	Partial application can be used to do DI. That's a given. It's a limiting view to consider it only that, though.	2019-02-07T17:36:42.112700	Huong
elmlang	general	^^ one of the nice things about Elm is that its designed to be used, not talked about :D let the mathematicians worry about category theory, we can think about if we any to but it doesnt get in the way	2019-02-07T17:37:20.112900	Danika
elmlang	general	Want*, not any	2019-02-07T17:37:43.113300	Danika
elmlang	general	well to be honest, it makes sense to use functional in webpage because of all the different thinks that can happen	2019-02-07T17:39:44.115200	Lupita
elmlang	general	things	2019-02-07T17:39:50.115500	Lupita
elmlang	general	i've pulled my hair out years ago with some jquey stuff and vowed never again	2019-02-07T17:41:06.116000	Lupita
elmlang	general	(One could say "DI is needed to make up for the lack of partial application", and that would be an equally incomplete-yet-not-completely-incorrect statement)	2019-02-07T17:45:25.117300	Huong
elmlang	general	very reasonable definition	2019-02-07T17:46:11.117800	Lupita
elmlang	general	Dependency Injection is something C# and Java developers made up to fix other problems :joy:	2019-02-07T17:50:37.118800	Agustin
elmlang	general	just nixed a ton of DI in my c# code base, it wasn't needed an tbh, made the code much more inflexible	2019-02-07T17:51:51.120000	Lupita
elmlang	general	the only reason i see using it is because of mocking.	2019-02-07T17:54:17.120900	Lupita
elmlang	general	Ruby went through a period of fascination with formal DI	2019-02-07T17:56:30.121300	Agustin
elmlang	general	Where you’d configure and use things rather than constants	2019-02-07T17:56:42.121600	Agustin
elmlang	general	But it was symptom of it not being functional enough to pass in your collaborators properly	2019-02-07T17:56:59.122000	Agustin
elmlang	general	Not enough SoC	2019-02-07T17:57:12.122300	Agustin
elmlang	general	have they fixed it in rails?	2019-02-07T17:57:14.122500	Lupita
elmlang	general	No and they shouldn’t	2019-02-07T17:57:36.122800	Agustin
elmlang	general	Thats not what Rails is for	2019-02-07T17:57:45.123000	Agustin
elmlang	general	If you want to go functional and use a Rails like framework, theres Phoenix :troll:	2019-02-07T17:58:06.123500	Agustin
elmlang	general	what is SoC mean?	2019-02-07T17:58:12.123700	Lupita
elmlang	general	Separation of Concerns	2019-02-07T17:58:21.124100	Agustin
elmlang	general	gotcha	2019-02-07T17:58:26.124500	Lupita
elmlang	general	i love phoenix so far	2019-02-07T17:58:38.125000	Lupita
elmlang	general	Yeah Phoenix is my current goto	2019-02-07T17:58:52.125300	Agustin
elmlang	general	But Rails has a place too	2019-02-07T17:58:57.125500	Agustin
elmlang	general	Just like wordpress does	2019-02-07T17:59:23.126000	Agustin
elmlang	general	we're using aspcore net for work apps	2019-02-07T18:00:02.126400	Lupita
elmlang	general	I’m sure they had legitimate reasons for that decision, I just can’t imagine what they are.	2019-02-07T18:01:02.127100	Agustin
elmlang	general	Beyond my cynical biased ones.	2019-02-07T18:01:17.127500	Agustin
elmlang	general	c# on the brain here	2019-02-07T18:01:27.127700	Lupita
elmlang	general	the service i'm working on is super simple, node js express would have been faster to develop and get working	2019-02-07T18:03:55.128800	Lupita
elmlang	general	so things i do like with c# but overall it's a pain	2019-02-07T18:04:59.129500	Lupita
elmlang	general	I just got a job where all they do is C#, coming from Laravel	2019-02-07T18:06:34.130400	Rosalee
elmlang	general	<@Lupita> F# seems pretty nice though	2019-02-07T18:06:45.130900	Nana
elmlang	general	I haden’t written a line of c# before last week. Lets just say I’m not sold.	2019-02-07T18:07:06.131400	Rosalee
elmlang	general	But I have to grind through it grr	2019-02-07T18:07:24.131800	Rosalee
elmlang	general	<@Lupita> If you have any good resources for getting up to speed with <http://asp.net\|asp.net> core mvc let me know	2019-02-07T18:07:56.133100	Rosalee
elmlang	general	well, i'm not a huge fan of static typing at all because i think it just lengthens your dev time	2019-02-07T18:08:11.133400	Lupita
elmlang	general	After using Elm, the type system in C# feels so clunky	2019-02-07T18:08:41.134200	Rosalee
elmlang	general	json is cake in perl, python, js :slightly_smiling_face:	2019-02-07T18:08:54.134600	Lupita
elmlang	general	<@Ike> yes, i will have to look up a tutorial that i liked. are you doing EF?	2019-02-07T18:09:27.135200	Lupita
elmlang	general	<@Lupita> I’ll dm you	2019-02-07T18:09:54.135900	Rosalee
elmlang	general	well, in languages like Java (and I assume C#), you're forced to type annotate everything, and you still get null pointer exceptions, which is probably the number one type error	2019-02-07T18:12:30.139300	Nana
elmlang	general	<@Rosalee> if you’re completely new to <http://asp.net\|asp.net> mvc, i’d suggest doing a 4-5 hr pluralsight course, they are taught by very experienced ppl and made me a intermediate over night. of course then you have to go and use it.	2019-02-07T18:12:34.139500	Ruthann
elmlang	general	I checked them out, and started a course only to realize it was out of date.	2019-02-07T18:13:11.140400	Rosalee
elmlang	general	they were following the latest mvc releases when i was looking at it back then… 4, 5, but i haven’t personally looked in a while… long while	2019-02-07T18:14:14.141200	Ruthann
elmlang	general	<@Nana> yes it's crazy but i try use it as simply as possible, if i don't need it , i don't use it. a common practice is hiding a lot of what something is doing by doing clever OO tricks	2019-02-07T18:18:13.142900	Lupita
elmlang	general	and you can also get unhandled exceptions	2019-02-07T18:19:42.144000	Nana
elmlang	general	so yeah then it kinda feels like you might as well go without static types	2019-02-07T18:20:06.144500	Nana
elmlang	general	but if static types actually mean that your application never crashes, then it's pretty cool	2019-02-07T18:20:38.145200	Nana
elmlang	general	i did a whole project in perl, no static types all functions were just hashes as parameters. was extremely maintainable.	2019-02-07T18:22:43.148100	Lupita
elmlang	general	I feel like we need to make the distinction between java-like type systems (~ subtyping) and ML-like type systems (hindley milner based, like what we use in Elm). They give you very different things. In Elm, they mean the compiler can really help you figure things out and guide you through huge refactors that would be a pain without that type system, and essentially mean you won't have runtime exceptions.	2019-02-07T18:23:13.148700	Huong
elmlang	general	yes i get that	2019-02-07T18:23:37.149000	Lupita
elmlang	general	Both static types, but a completely different set of guarantees	2019-02-07T18:23:53.149400	Huong
elmlang	general	i did a c# project where everything i got from sql db was either a dictionary<string, string> or a list of dictionaries all strings and then i didn't have to worry about objects. I just did type conversion when needed for ints, dates, floats and had a reasonable about of teritary code to avoid exceptions and never had any issues with it. dev time was a fraction of what it would have been otherwise	2019-02-07T18:26:59.152600	Lupita
elmlang	general	i have about 4 or 5 generic functions that could query any sql and return that. and then was able to use linq to get what i needed. it was stupid simple	2019-02-07T18:29:22.154000	Lupita
elmlang	general	That's cool that that worked for you! I usually mess up big time in such situations, and really appreciate the compiler helping me make sure everything has the shape I want it to be - no possibility of surprises.	2019-02-07T18:33:07.157600	Huong
elmlang	general	But hey, to each their own, and who knows, it might grow on you, too :wink:	2019-02-07T18:33:26.158100	Huong
elmlang	general	i wrote that system in about 2 weeks. start to finish and it was super ez to maintain. poor man's ef is what i called it	2019-02-07T18:35:02.159600	Lupita
elmlang	general	the only issue i hate with it was it was a WCF service that i called and i had to use a stupid service reference	2019-02-07T18:40:26.162900	Lupita
elmlang	general	Quick design question. I have a `model`. The `model` has a `query` type attached to it. The `query` has a `filters` type. The `filters` type has a bunch of properties like `inStock`, `bpaFree`, etc. Those filters are implemented by a type called `BooleanFilter`. Visually, it looks a bit like this: ``` model query filters inStock bpaFree ``` I omitted a bunch of other properties on the `model`, `query`, and `filters` types. I have a lot of repeated code that handles toggling the filters. It looks something like this: ``` let query = model.query filters = model.query.filters in filters.inStock \|> (\filter -> BooleanFilter (not filter.value)) \|> (\updatedFilter -> { filters \| inStock = updatedFilter }) \|> (\updatedFilters -> { query \| filters = updatedFilters }) \|> (\updatedQuery -> { model \| query = updatedQuery }) ``` I have this block of code for each of the properties on `filters`. There are a lot of them. How would you go about DRYing this up?	2019-02-07T21:04:23.173200	Marcus
elmlang	general	You can pull everything but the `.inStock` and `\updateFilter -> ...` out.	2019-02-07T21:23:22.174100	Earnest
elmlang	general	So I'd make my call something like ``` toggleFilter : (Filters -> Bool) -> (Filters -> Bool -> Filters) -> Model -> Model -- usage model \|> toggleFilter .inStock (\f v -> { f \| inStock = v }) ```	2019-02-07T21:25:35.176000	Earnest
elmlang	general	Ah, I like it.	2019-02-07T21:26:47.176200	Marcus
elmlang	general	I always forget about the `.inStock` syntax.	2019-02-07T21:27:16.176600	Marcus
elmlang	general	Thanks	2019-02-07T21:27:27.176800	Marcus
elmlang	general	i need to learn that ^	2019-02-07T21:32:52.177800	Lupita
elmlang	general	You can access a property on a record like `filters.inStock` or like `(.inStock filters)`. So, you can pass the accessor around like a function (since it is).	2019-02-07T21:35:41.179700	Marcus
elmlang	general	In the example above, `.inStock` is passed in as a parameter.	2019-02-07T21:36:16.180200	Marcus

elmlang

general

Yeah I didn't have any luck implementing an animation

2019-02-07T16:33:58.081500

Karrie

elmlang

general

Eventually, after not finding a solution, I resorted to ports and JavaScript

2019-02-07T16:34:35.081700

Karrie

elmlang

general

Basically I have an outgoing port that will "tell" js that he needs to scroll down or up

2019-02-07T16:35:18.082100

Karrie

elmlang

general

You can pass all the parameters you want to the port, depending on your case

2019-02-07T16:35:41.082700

Karrie

elmlang

general

Tanks <@Earnest> i will look into this one.

2019-02-07T16:36:12.083400

Olene

elmlang

general

Thanks*

2019-02-07T16:36:21.083600

Olene

elmlang

general

its looks like there was Http.toTask in the 0.18 version. I wonder why it was removed. is it better to keep track of the different requests (used as partial steps) as part of the model (i.e. different Msg for different request) then using chaining task one after another and then create the final Msg (just want to know how to approach that problem without polluting the model too much)

2019-02-07T16:42:12.088000

Olene

elmlang

general

any talks to move elm to use webasm?

2019-02-07T16:59:46.088400

Lupita

elmlang

general

Yes. I think at least three of us have done little Elm to wasm projects, but I dont think anything has taken off.

2019-02-07T17:02:59.089100

Ashton

elmlang

general

i'm so super intrigued with elm. coming from vue, it's an interesting experience but still total noob

2019-02-07T17:10:58.089700

Lupita

elmlang

general

work in c# and omg i want to wring the necks of some of the devs who think functional is bad

2019-02-07T17:11:26.090300

Lupita

elmlang

general

was there a particular reason that elm uses currying?

2019-02-07T17:12:59.091500

Lupita

elmlang

general

Uh, I dont know. Good question. Elm looks a lot like Haskell, which also has partial application and currying. Seems like its just second nature to functional programming languages. So theres a lot of history there.

2019-02-07T17:14:36.092800

Ashton

elmlang

general

But, it is super useful.

2019-02-07T17:14:40.093000

Ashton

elmlang

general

I think.

2019-02-07T17:14:47.093200

Ashton

elmlang

general

i get it makes stuff like mapping easier

2019-02-07T17:15:34.094000

Lupita

elmlang

general

Currying leads to partially applying functions

2019-02-07T17:20:10.095100

Danika

elmlang

general

a poor mans dependency injection :slightly_smiling_face:

2019-02-07T17:22:25.095900

Lupita

elmlang

general

I think you’d offend a lot of people saying that ^^

2019-02-07T17:24:35.096800

Danika

elmlang

general

I gotta admit I got a bit riled up, but then decided one can think what one wants :)

2019-02-07T17:26:00.099200

Bert

elmlang

general

well not sure how else i would put it.

2019-02-07T17:26:04.099300

Lupita

elmlang

general

Curried functions is a mathematical concept that predates dependency injection

2019-02-07T17:26:30.100000

Danika

elmlang

general

ok so DI is an example of currying.

2019-02-07T17:27:38.100900

Lupita

elmlang

general

Currying (or partial application) is a function level thing. You apply some of the arguments of a function, but not all. That's it.

2019-02-07T17:29:36.103200

Bert

elmlang

general

You’re gonna offend just as many people equating currying to partial application :smirk:

2019-02-07T17:30:11.104400

Danika

elmlang

general

Not as many :smile:

2019-02-07T17:30:47.105000

Bert

elmlang

general

it's an interesting discussion but nothing to get offended about. i choose to look at it in practical terms

2019-02-07T17:32:40.106100

Lupita

elmlang

general

I dont think many *here* will be offended, and i think its silly to get all anal about it. But FP has its roots deeeeep in maths and academia and so you get a lot of people that take everything too seriously

2019-02-07T17:33:59.107800

Danika

elmlang

general

i get it. i'll tread lightly. really the only functional lang i've seen is erlang/exlixir before elm.

2019-02-07T17:35:02.108900

Lupita

elmlang

general

We dont mind here, we’re a fun bunch

2019-02-07T17:35:15.109700

Danika

elmlang

general

but makes sense when you see it done in js and then realize that's how all that redux is done

2019-02-07T17:35:37.110600

Lupita

elmlang

general

Partial application can be used to do DI. That's a given. It's a limiting view to consider it only that, though.

2019-02-07T17:36:42.112700

Huong

elmlang

general

^^ one of the nice things about Elm is that its designed to be used, not talked about :D let the mathematicians worry about category theory, we can think about if we any to but it doesnt get in the way

2019-02-07T17:37:20.112900

Danika

elmlang

general

Want*, not any

2019-02-07T17:37:43.113300

Danika

elmlang

general

well to be honest, it makes sense to use functional in webpage because of all the different thinks that can happen

2019-02-07T17:39:44.115200

Lupita

elmlang

general

things

2019-02-07T17:39:50.115500

Lupita

elmlang

general

i've pulled my hair out years ago with some jquey stuff and vowed never again

2019-02-07T17:41:06.116000

Lupita

elmlang

general

(One could say "DI is needed to make up for the lack of partial application", and that would be an equally incomplete-yet-not-completely-incorrect statement)

2019-02-07T17:45:25.117300

Huong

elmlang

general

very reasonable definition

2019-02-07T17:46:11.117800

Lupita

elmlang

general

Dependency Injection is something C# and Java developers made up to fix other problems :joy:

2019-02-07T17:50:37.118800

Agustin

elmlang

general

just nixed a ton of DI in my c# code base, it wasn't needed an tbh, made the code much more inflexible

2019-02-07T17:51:51.120000

Lupita

elmlang

general

the only reason i see using it is because of mocking.

2019-02-07T17:54:17.120900

Lupita

elmlang

general

Ruby went through a period of fascination with formal DI

2019-02-07T17:56:30.121300

Agustin

elmlang

general

Where you’d configure and use things rather than constants

2019-02-07T17:56:42.121600

Agustin

elmlang

general

But it was symptom of it not being functional enough to pass in your collaborators properly

2019-02-07T17:56:59.122000

Agustin

elmlang

general

Not enough SoC

2019-02-07T17:57:12.122300

Agustin

elmlang

general

have they fixed it in rails?

2019-02-07T17:57:14.122500

Lupita

elmlang

general

No and they shouldn’t

2019-02-07T17:57:36.122800

Agustin

elmlang

general

Thats not what Rails is for

2019-02-07T17:57:45.123000

Agustin

elmlang

general

If you want to go functional and use a Rails like framework, theres Phoenix :troll:

2019-02-07T17:58:06.123500

Agustin

elmlang

general

what is SoC mean?

2019-02-07T17:58:12.123700

Lupita

elmlang

general

Separation of Concerns

2019-02-07T17:58:21.124100

Agustin

elmlang

general

gotcha

2019-02-07T17:58:26.124500

Lupita

elmlang

general

i love phoenix so far

2019-02-07T17:58:38.125000

Lupita

elmlang

general

Yeah Phoenix is my current goto

2019-02-07T17:58:52.125300

Agustin

elmlang

general

But Rails has a place too

2019-02-07T17:58:57.125500

Agustin

elmlang

general

Just like wordpress does

2019-02-07T17:59:23.126000

Agustin

elmlang

general

we're using aspcore net for work apps

2019-02-07T18:00:02.126400

Lupita

elmlang

general

I’m sure they had legitimate reasons for that decision, I just can’t imagine what they are.

2019-02-07T18:01:02.127100

Agustin

elmlang

general

Beyond my cynical biased ones.

2019-02-07T18:01:17.127500

Agustin

elmlang

general

c# on the brain here

2019-02-07T18:01:27.127700

Lupita

elmlang

general

the service i'm working on is super simple, node js express would have been faster to develop and get working

2019-02-07T18:03:55.128800

Lupita

elmlang

general

so things i do like with c# but overall it's a pain

2019-02-07T18:04:59.129500

Lupita

elmlang

general

I just got a job where all they do is C#, coming from Laravel

2019-02-07T18:06:34.130400

Rosalee

elmlang

general

<@Lupita> F# seems pretty nice though

2019-02-07T18:06:45.130900

Nana

elmlang

general

I haden’t written a line of c# before last week. Lets just say I’m not sold.

2019-02-07T18:07:06.131400

Rosalee

elmlang

general

But I have to grind through it grr

2019-02-07T18:07:24.131800

Rosalee

elmlang

general

<@Lupita> If you have any good resources for getting up to speed with <http://asp.net|asp.net> core mvc let me know

2019-02-07T18:07:56.133100

Rosalee

elmlang

general

well, i'm not a huge fan of static typing at all because i think it just lengthens your dev time

2019-02-07T18:08:11.133400

Lupita

elmlang

general

After using Elm, the type system in C# feels so clunky

2019-02-07T18:08:41.134200

Rosalee

elmlang

general

json is cake in perl, python, js :slightly_smiling_face:

2019-02-07T18:08:54.134600

Lupita

elmlang

general

<@Ike> yes, i will have to look up a tutorial that i liked. are you doing EF?

2019-02-07T18:09:27.135200

Lupita

elmlang

general

<@Lupita> I’ll dm you

2019-02-07T18:09:54.135900

Rosalee

elmlang

general

well, in languages like Java (and I assume C#), you're forced to type annotate everything, and you still get null pointer exceptions, which is probably the number one type error

2019-02-07T18:12:30.139300

Nana

elmlang

general

<@Rosalee> if you’re completely new to <http://asp.net|asp.net> mvc, i’d suggest doing a 4-5 hr pluralsight course, they are taught by very experienced ppl and made me a intermediate over night. of course then you have to go and use it.

2019-02-07T18:12:34.139500

Ruthann

elmlang

general

I checked them out, and started a course only to realize it was out of date.

2019-02-07T18:13:11.140400

Rosalee

elmlang

general

they were following the latest mvc releases when i was looking at it back then… 4, 5, but i haven’t personally looked in a while… long while

2019-02-07T18:14:14.141200

Ruthann

elmlang

general

<@Nana> yes it's crazy but i try use it as simply as possible, if i don't need it , i don't use it. a common practice is hiding a lot of what something is doing by doing clever OO tricks

2019-02-07T18:18:13.142900

Lupita

elmlang

general

and you can also get unhandled exceptions

2019-02-07T18:19:42.144000

Nana

elmlang

general

so yeah then it kinda feels like you might as well go without static types

2019-02-07T18:20:06.144500

Nana

elmlang

general

but if static types actually mean that your application never crashes, then it's pretty cool

2019-02-07T18:20:38.145200

Nana

elmlang

general

i did a whole project in perl, no static types all functions were just hashes as parameters. was extremely maintainable.

2019-02-07T18:22:43.148100

Lupita

elmlang

general

I feel like we need to make the distinction between java-like type systems (~ subtyping) and ML-like type systems (hindley milner based, like what we use in Elm). They give you very different things. In Elm, they mean the compiler can really help you figure things out and guide you through huge refactors that would be a pain without that type system, and essentially mean you won't have runtime exceptions.

2019-02-07T18:23:13.148700

Huong

elmlang

general

yes i get that

2019-02-07T18:23:37.149000

Lupita

elmlang

general

Both static types, but a completely different set of guarantees

2019-02-07T18:23:53.149400

Huong

elmlang

general

i did a c# project where everything i got from sql db was either a dictionary<string, string> or a list of dictionaries all strings and then i didn't have to worry about objects. I just did type conversion when needed for ints, dates, floats and had a reasonable about of teritary code to avoid exceptions and never had any issues with it. dev time was a fraction of what it would have been otherwise

2019-02-07T18:26:59.152600

Lupita

elmlang

general

i have about 4 or 5 generic functions that could query any sql and return that. and then was able to use linq to get what i needed. it was stupid simple

2019-02-07T18:29:22.154000

Lupita

elmlang

general

That's cool that that worked for you! I usually mess up big time in such situations, and really appreciate the compiler helping me make sure everything has the shape I want it to be - no possibility of surprises.

2019-02-07T18:33:07.157600

Huong

elmlang

general

But hey, to each their own, and who knows, it might grow on you, too :wink:

2019-02-07T18:33:26.158100

Huong

elmlang

general

i wrote that system in about 2 weeks. start to finish and it was super ez to maintain. poor man's ef is what i called it

2019-02-07T18:35:02.159600

Lupita

elmlang

general

the only issue i hate with it was it was a WCF service that i called and i had to use a stupid service reference

2019-02-07T18:40:26.162900

Lupita

elmlang

general

Quick design question. I have a `model`. The `model` has a `query` type attached to it. The `query` has a `filters` type. The `filters` type has a bunch of properties like `inStock`, `bpaFree`, etc. Those filters are implemented by a type called `BooleanFilter`. Visually, it looks a bit like this: ``` model query filters inStock bpaFree ``` I omitted a bunch of other properties on the `model`, `query`, and `filters` types. I have a lot of repeated code that handles toggling the filters. It looks something like this: ``` let query = model.query filters = model.query.filters in filters.inStock |> (\filter -> BooleanFilter (not filter.value)) |> (\updatedFilter -> { filters | inStock = updatedFilter }) |> (\updatedFilters -> { query | filters = updatedFilters }) |> (\updatedQuery -> { model | query = updatedQuery }) ``` I have this block of code for each of the properties on `filters`. There are a lot of them. How would you go about DRYing this up?

2019-02-07T21:04:23.173200

Marcus

elmlang

general

You can pull everything but the `.inStock` and `\updateFilter -> ...` out.

2019-02-07T21:23:22.174100

Earnest

elmlang

general

So I'd make my call something like ``` toggleFilter : (Filters -> Bool) -> (Filters -> Bool -> Filters) -> Model -> Model -- usage model |> toggleFilter .inStock (\f v -> { f | inStock = v }) ```

2019-02-07T21:25:35.176000

Earnest

elmlang

general

Ah, I like it.

2019-02-07T21:26:47.176200

Marcus

elmlang

general

I always forget about the `.inStock` syntax.

2019-02-07T21:27:16.176600

Marcus

elmlang

general

Thanks

2019-02-07T21:27:27.176800

Marcus

elmlang

general

i need to learn that ^

2019-02-07T21:32:52.177800

Lupita

elmlang

general

You can access a property on a record like `filters.inStock` or like `(.inStock filters)`. So, you can pass the accessor around like a function (since it is).

2019-02-07T21:35:41.179700

Marcus

elmlang

general

In the example above, `.inStock` is passed in as a parameter.

2019-02-07T21:36:16.180200

Marcus