budgie
Can you refer to a function with optional arguments with the function/2 syntax? Is there another way to refer to them?
I’m creating a generic form LiveComponent that will work for creating and editing a few different kinds of schemas that share some common fields.
In order to do that, I need to be able to pass functions such as Items.change_item/1,2, Items.create_item/1, and Items.update_item/2.
If I’m barking up the wrong tree by passing in the functions like this, what other solution would be suitable for building a generic form like this? I’ve thought about creating a common changeset for the shared fields, but not sure that’s the correct solution either.
Most Liked
al2o3cr
Optional arguments are a shorthand for defining a handful of function heads with different argument counts:
def foo(bar, baz \\ 1, wat \\ 2, huh \\ 3), do: ...
is a short way to write:
def foo(bar), do: foo(bar, 1, 2, 3)
def foo(bar, baz), do: foo(bar, baz, 2, 3)
def foo(bar, baz, wat), do: foo(bar, baz, wat, 3)
def foo(bar, baz, wat, huh), do: ...
Capturing one specific head with (eg &foo/3) results in a function that expects exactly three arguments.
Popular in Questions
Other popular topics
Latest on Elixir Forum
Sponsor Spotlight
Phoenix, LiveView, multimedia pipelines, distributed systems. 400 engineers, Elixir since 2017. Available for hire.
Categories:
Sub Categories:
Forums
Popular Tags
- #ecto
- #liveview
- #troubleshooting
- #learning-elixir
- #deployment
- #library
- #erlang
- #testing
- #genserver
- #mix
- #absinthe
- #remote-other
- #otp
- #plug
- #how-to-question
- #macros
- #postgres
- #channels
- #elixirconf
- #exunit
- #discussion
- #code-sync
- #javascript
- #podcasts
- #onsite
- #dialyzer
- #docker
- #authentication
- #umbrella
- #full-time-contract
- #podcasts-by-brainlid
- #ecto-query
- #elixir-ls
- #phoenix_html
- #iex
- #blog-post
- #graphql
- #genstage
- #ai
- #websockets
- #supervisor
- #advent-of-code
- #elixirconf-us
- #distillery
- #processes
- #forms
- #api
- #metaprogramming
- #security
- #performance
Our Sponsors
Build Elixir applications with speed and confidence.
Supporting innovation across the BEAM ecosystem.
We build reliable cloud platforms for business-critical systems.
Catch errors, track performance, monitor hosts and more.
Error tracking for Elixir devs who love to ship. Start your free account.
Practical resources that improve the lives of professional developers.
Enabling companies to succeed by building software people love.
The deployment platform built for Elixir: PaaS ease, VPS control.
The team behind Membrane, Popcorn, LiveDebugger. Available for hire.
Courses that'll move you from confusion to "Aha, now I get it!"