Designing OOP R

This skill covers object-oriented programming in R, including S7, S3, S4, and vctrs-based classes.

Decision Tree: What Are You Building?

1. Vector-like objects (behave like atomic vectors)

Use vctrs when:

• Need data frame integration (columns/rows)
• Want type-stable vector operations
• Building factor-like, date-like, or numeric-like classes
• Need consistent coercion/casting behavior
• Working with existing tidyverse infrastructure

Examples: custom date classes, units, categorical data

2. General objects (complex data structures, not vector-like)