Curriculum Collections Arrays vs slices exercise 4 · mcq
Arrays vs slices
Pre-allocate room for many entries but start *empty*, so the
first append doesn't reallocate. Pick the Go form.
TypeScript reference
About this theme
Go has fixed-size arrays ([N]T) and dynamically-sized slices ([]T). You almost always want slices. A slice is a view over a backing array — three machine words: pointer, length, capacity. append grows it; make pre-sizes it. The mental model is closer to Rust's Vec than to TS's Array.