Code Review: Slices and Arrays

Use slices instead of arrays, unless the number of elements never changes.

Prefer nil slices to empty slice literals.

If you know how many elements you need in a slice, size it with make.

Don’t use make([]T, length) to create a slice and then append the slice. append adds new values to the end of a slice, starting at position length+1.

Use slices.Clone (or copy with a sized destination) to duplicate a slice.

Be very careful when slicing slices. Treat the resulting slices as read-only to avoid data sharing surprises.

Before writing your own slice manipulation function, check the standard library to make sure it hasn’t already been implemented.