Ruby Issue Tracking System

06/02/2025

10:17 AM Ruby Feature #21387: Proposal to add Data#[]

@zverok @eregon Thanks for the feedback.
Reconsidering my motivation, I may have expected `Data` to be something like an *immutable* `Struct` (or even an *immutable* `Hash`).
I'm still attracted to this idea of an immutable `Hash`-... ybiquitous (Masafumi Koba)

05/31/2025

01:41 PM Ruby Feature #21387: Proposal to add Data#[]

@zverok Thank you for the feedback!
My example of `data_people.pluck(:name)` was not so good, sorry. A strength of `pluck` is to accept multiple keys like `data_people.pluck(:name, :age)`, so `.map` isn't a proper alternative in this ... ybiquitous (Masafumi Koba)

06:10 AM Ruby Feature #21387 (Open): Proposal to add Data#[]

## Proposal
I propose to add a new instance method `#[]` to the `Data` class, similar to [`Struct#[]`](https://docs.ruby-lang.org/en/3.4/Struct.html#method-i-5B-5D).
If writing the method signature in RBS, it would be like this:
... ybiquitous (Masafumi Koba)