Iterator for badgerDB
// Iterator adds an implementable target for variations of different Iterator's
// for simplification of functional code, that you can then implement this reduced
// interface such that primarily methods Rewind and Valid and Next are overloaded.
// usage:
// for iterator.Rewind(); iterator.Valid(); iterator.Next() {
// iterator.Item()
// ...
// }
// this is a general snippet of code that using this interface may have overloaded
// only Rewind and Valid are changes
type Iterator interface {
Rewind()
Valid() bool
Next()
Item() *badger.Item
}This library also add 5 concrete iterators: prefix, from-to, from, to, prefix-from.
The library does not support backward key-scan (whence only a prefix-from)
Use the method biter.KeyRangeIterator and throw any combination of prefix, from and to at it to get the corresponding Iterator.
for some examples of functionality refer to queries_test.go