Learn how to identify and remove irrelevant features from your dataset using various methods and tools. Improve the quality, accuracy, and efficiency of your data mining models.

Summary This PR addresses #6013 by reusing unchanged columns from the original dataset in the map() method when input_columns is specified. What’s Implemented Injected logic at the end of Dataset.map( ...

=== Dangerous operation detected #strong_migrations === Active Record caches attributes, which causes problems when removing columns. Be sure to ignore the column: class User < ApplicationRecord ...