R Studio Assignment Help: Why It’s Essential for Students

MIX_ENV=prod WEBPACK_ENV=prod PORT=4001 mix phx.server
just webpack-dev-watch

#elixir

plug error handler exception

  @impl Plug.ErrorHandler
  def handle_errors(conn, %{
        kind: _kind,
        reason: %ArgumentError{
          message: message
        },
        stack: _stack
      }) do
    conn
    |> put_status(:bad_request)
    |> json(%{error: message})
  end

  def handle_errors(conn, %{kind: _kind, reason: _reason, stack: _stack}) do
    json(conn, %{error: "Something went wrong"})
  end

#elixir

create graphql server in elixir using Absinthe.

defmodule GraphQL.GraphqlSchema do
  use Absinthe.Schema

  alias GraphQL.Book

  @desc "A Book"
  object :book do
    field :id, :integer
    field :name, :string
    field :author, :string

  end

# Example fake data
@book_information %{
  "book1" => %{id: 1, name: "Harry Potter", author: "JK Rowling"},
  "book2" => %{id: 2, name: "Charlie Factory", author: "Bernard"},
  "book3" => %{id: 3, name: "Sherlock Holmes", author: "Sheikhu"}
}

@desc "hello world"
query do
 import_fields(:book_queries)
end

object :book_queries do
  field :book_info, :book do
    arg :id, non_null(:id)
    resolve fn %{id: book_id}, _ ->
      {:ok, @book_information[book_id]}
    end
  end

  field :get_book, :book do
    arg(:id, non_null(:id))
    resolve fn %{id: bookId}, _ ->
      {:ok, Book.get_info!(bookId)}
    end
  end

  field :get_all_books, non_null(list_of(non_null(:book))) do
    resolve fn _, _, _ ->
      {:ok, Book.list_information()}
    end
  end
end

mutation do
  import_fields(:mutations)
end

object :mutations do
  field :create_book, :book do
    arg(:name, non_null(:string))
    arg(:author, non_null(:string))
    resolve fn args, _ ->
       Book.create_info(args)
    end
  end
end
end

# mix.ex
{:absinthe, "~> 1.7"},
{:absinthe_plug, "~> 1.5"},
{:cors_plug, "~> 3.0"}

# For that go to endpoint.ex file. In the file right above plug MyBlogApiWeb.Router add this line plug CORSPlug, origin:"*". The option origin means, what origin we should allow traffic from.
# Adding "*" means we are allowing traffic from everywhere. If we want to be specific for our ember application. We can add origin: "localhost:4200".
plug CORSPlug, origin: "*"
plug CORSPlug, origin: ~r/^https?:\/\/localhost:\d{4}$/

# router.ex

scope "/api", GraphQLWeb do
  pipe_through :api
  forward("/", Absinthe.Plug, schema: GraphQL.Grapha)
end

scope "/" do
  forward "/GraphiQL", Absinthe.Plug.GraphiQL, schema: GraphQL.Grapha
end

# Or endpoint.ex

plug Absinthe.Plug.GraphiQL, schema: App.GraphQL.Schema

#elixir

R Studio Assignment Help: Why It’s Essential for Students

R Studio has emerged as one of the most powerful tools for data analysis, statistical computing, and graphical representation. Students in various fields such as data science, statistics, and computer science rely heavily on it for their academic projects. However, mastering R Studio is no easy task. It requires a deep understanding of programming concepts, statistical theories, and the ability to work with complex data sets. This is where R Studio assignment help becomes essential for students striving to excel in their coursework.

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