named_args alternatives and similar packages
Based on the "Macros" category.
Alternatively, view named_args alternatives based on common mentions on social networks and blogs.
-
rulex
This tiny library (2 macros only) allows you to define very simple rule handler using Elixir pattern matching. -
apix
Simple convention and DSL for transformation of elixir functions to an API for later documentation and or validation. -
Bang
Bang simply adds dynamic bang! functions to your existing module functions with after-callback.
InfluxDB - Power Real-Time Data Analytics at Scale
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README
NamedArgs
Inspired by Named Arguments with Elixir
Allows you to use named arguments similar to Ruby's named arguments. For example, in Ruby
def introduction(name: 'Sarah', birthday: "1985-12-30")
puts "Hi my name is #{name} and I was born on #{birthday}"
end
However in Elixir, using a default argument ends up dropping the other values.
defmodule Talk do
def introduction(opts \\ [name: "Sarah", birthday: "1985-12-30"]) do
IO.puts "Hi my name is #{opts[:name]} and I was born on #{opts[:birthday]}"
end
end
# Drops the birthday
Talk.introduction(name: "Joe") # => Hi my name is Joe and I was born on
# Drops the name
Talk.introduction(birthday: "1985-12-30") # => Hi my name is and I was born on 1985-12-30
With NamedArgs
you can instead do the following:
defmodule Talk do
use NamedArgs
def introduction(opts \\ [name: "Sarah", birthday: "1985-12-30"]) do
IO.puts "Hi my name is #{opts[:name]} and I was born on #{opts[:birthday]}"
end
end
# No params!
Talk.introduction # => Hi my name is Sarah and my birthday is 1985-12-30
# Keeps the birthday
Talk.introduction(name: "Joe") # => Hi my name is Joe and I was born on 1985-12-30
# Keeps the name
Talk.introduction(birthday: "1986-01-01") # => Hi my name is Sarah and I was born on 1986-01-01
# Order does not matter!
Talk.introduction(birthday: "1986-01-01", name: "Joe") # => Hi my name is Joe and I was born on 1986-01-01
Installation
This package is available in Hex, to install:
- Add named_args to your list of dependencies in
mix.exs
:
def deps do
[
{:named_args, "~> 0.1.0"}
]
end
But it doesn't create a variable with the same name?
Yup, I'm still not sure if thats a desired feature or not. Because it would implicitly create a variable that you may or may not decide to use, it goes against a lot of the philosophies that Elixir follows in regard to explicit coding. And the compiler would warn you about it (and it couldn't be fixed either).
If possible to remove the compiler warning this feature may become more attractive. Please let me know if you have ideas about this!