Slices

Arrays and slices are closely related but behave very differently. Confusing them is a common source of bugs and a reliable interview topic. For a deeper runtime dive, see Slice internals.

Slices are the bread and butter of Go programming. Most developers use them daily without thinking twice — and that comfort is exactly where subtle, load-dependent bugs come from. This article pulls back the curtain on how slices are represented in memory and explains the class of bug that emerges when two slices quietly share the same underlying array.