https://nalar.dev/tags/capacity/ Recent content in Capacity on Nalar Hugo en-us Sat, 12 Sep 2026 00:00:00 +0700 https://nalar.dev/limit-go-slice-capacity-with-slices-clip/ Sat, 12 Sep 2026 00:00:00 +0700 https://nalar.dev/limit-go-slice-capacity-with-slices-clip/ <p>A Go slice can be short while still carrying much more capacity than its current length. That extra capacity is useful when more elements are expected, but sometimes code should hand off a slice without leaving room for an <code>append</code> to reuse the same tail. <code>slices.Clip</code> gives that intent a direct operation.</p> <p><code>Clip</code> returns a slice with the same elements and length, but its capacity is reduced to its length.</p> https://nalar.dev/reserve-go-slice-capacity-with-slices-grow/ Fri, 11 Sep 2026 00:00:00 +0700 https://nalar.dev/reserve-go-slice-capacity-with-slices-grow/ <p>Repeated <code>append</code> calls can force a Go slice to move to a larger backing array when its capacity runs out. If code already knows that several more elements are about to arrive, <code>slices.Grow</code> can reserve enough room before those appends happen.</p> <p>The key detail is that <code>slices.Grow</code> changes capacity when needed, not length. Existing elements stay in place logically, and the returned slice still contains the same number of elements.</p>