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Questions - elm

Monadic bind with Cmd

I have a function convertMsg : Msg1 -> List Msg2 where Msg1 and Msg2 are certain message types. And I would like to turn this into a function: convertCmd : Cmd Msg1 -> Cmd Msg2 Which would fo...
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Wheat Wizard

monads

elm

Votes: 0

Answers: 1

Latest Answer

What you're trying to do to messages, how you might, and whether it's a good plan I promise I'll try to answer what I think you're trying to do, but first I think there's a more important thing... You...
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AndrewC

How do I initialize a type alias like this in Elm?

type alias Bag a = List (a, Int) I am trying to create functions that work with this type alias but I can't figure out how to return a Bag from a function.. Like in the following function I am hopin...
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Deece5531

functional-programming

elm

Votes: 0

Answers: 1

Latest Answer

You don't need to write Bag a: in front of bags. The compiler can deduce what type you need. You do need to match up the indentation for the different branches of your case: insert : a -> Bag a -&g...
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AndrewC

elm-graphq: Get list of all objects from connection query

I am in deep water. I am trying to get all rows from a PostgreSQL database through a GraphQL api. I am using the dillonkearns/elm-graphql elm package. This is my query (image for context): query getAl...
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Bjamse

postgresql

graphql

elm

Votes: 0

Answers: 1

Latest Answer

import Browser import Calendar.Object.Events1 as Events1Object import Calendar.Object.Events1SConnection as Events1SConnection import Calendar.Query as Query import Graphql.Operation exposing (RootQue...
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chriscberks

Propositions Parser using recursion in Elm

Yesterday, I posted about an assignment I got for parsing logical propositions. After a lot of research and trying different things, I got it to work for individual propositions: going from a string t...
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halfemptyorhalffull

parsing

recursion

logic

logical-operators

elm

Votes: 0

Answers: 1

Latest Answer

You're almost there, but you need a parser that can parse any kind of proposition, and you need to call that recursively instead of the individual parsers. There's a couple ways you can do that. The e...
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glennsl

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