The slices package provides reusable generic operations for Go slice values, including equality checks, membership tests, and element removal. It is useful when ordinary slice manipulation would otherwise require repeated, use-case-specific functions. section 5.6
A bounded generic cache uses slices to maintain insertion order:
- Store keys in chronologicalKeys, initialized with a capacity matching the cache limit. section 7.4.2
- Use slices.DeleteFunc to remove an updated, deleted, or expired key from the middle of the ordering. section 7.4.2
- Append updated keys at the end and remove the oldest key when the cache reaches its maximum size. section 7.4.2
Removing a cache key
c.chronologicalKeys = slices.DeleteFunc(c.chronologicalKeys, func(k K) bool { return k == key }) removes matching keys while the associated map entry is deleted separately.
