Intro
Today I've been struggling on transforming a camelCase word combined with a number
to become a snake_case atom
"helloWorld30" -> :hello_world_30
I tried using Macro.underscore/1
before and found out that I should not use it to manipulate strings to add underscore.
...Do not use it as a general mechanism for underscoring strings as it does not support Unicode or characters that are not valid in Elixir identifiers.
elixir docs
That's why I used Inflex: An Elixir library for handling word inflections
iex) "helloWorld30"
|> Inflex.underscore()
iex) "hello_world30"
Someone Helped Me Please!
But still using Inflex
alone cannot show the output that I want.
Luckily I asked to the community and thank God someone helped me.
Shout out to Karl Seguin
🚀.
He come up on suggesting using RegEx
module.
Here is the RegEx that he gave.
iex) Regex.replace(~r/([A-Za-z])(\d)/, "Hello World9000", "\\1_\\2")
iex) "Hello World_9000"
My Own Version
With another version using String
module.
iex) "helloWorld30
|> String.replace(~r/(\D)(\d)/, "\\1_\\2")
iex) "helloWorld_30"
Overall output
To transform a camelCase word together with a number to become a snake_case atom:
iex) "helloWorld30"
|> Inflex.underscore()
|> String.replace(~r/(\D)(\d)/, "\\1_\\2")
|> String.to_atom()
iex) "hello_world_30"
Happy coding!
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