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		uryga on April 5, 2020 \| parent \| context \| favorite \| on: Rust Dataframe: Update 1 i use pure functions wherever i can, but is this always the right approach when dealing with large dataframes? i imagine when you're chaining a few methods, it'd generate a large number of intermediate results that immediately get discarded/transformed again: `frame.foo_columns().bar_rows().baz()` the result of .foo_columns() is basically linear – it gets passed to .bar_rows() immediately, with no other references to it. maybe this'd be a good place for rust's safe mutability magic?

wtetzner on April 8, 2020 [–]

If each of those methods consumes `self` instead of taking a reference to it, then the methods are effectively pure, and don't require copying.

uryga on April 9, 2020 | [–]

yeah, that's what i meant by "linear" (as in linear types, similar to rust's ownership stuff, just terminology i'm more familiar with)

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