Proposal: String.swapcase/1 & String.center/2 & String.center/3

[Dunya Kirkali]

Hi,

I would like to propose to introduce a `swapcase/1` function to the `Sting` module.

Lately I have been rewriting some of my old Ruby code in Elixir and have realized that some of the handy String functions from Ruby were not yet there in Elixir.

So I wrote a module to achieve those. But I thought since such functions are already in core Ruby that maybe we would also like to have them in Elixir.

It's obviously not a must have. I'd be happy to prepare a PR if accepted!

[Dunya Kirkali]

A small Edit:

I would like to propose to introduce a `swapcase/1`, `center/2` & `center/3` functions to the `Sting` module.

[Louis Pilfold]

Hi Dunya

What would these functions do?

Cheers,
Louis

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[Dunya Kirkali]

Similar to their Ruby equivalents:

# String.swapcase/1

"hELLO" = Tanga.swapcase("Hello")

# String.center/2

"       hello        " = String.center("hello", 20)

# String.center/3

"~~~~~~~hello~~~~~~~~~" = String.center("hello", 20, "~")

[Dunya Kirkali]

Created a PR: https://github.com/elixir-lang/elixir/pull/7276