immudb is a database with built-in cryptographic proof and verification. It tracks changes in sensitive data and the integrity of the history will be protected by the clients, without the need to trust the database. It can operate both as a key-value store, and/or as relational database (SQL).
A Persistent Java Collections Library
PCollections serves as a persistent and immutable analogue of the Java Collections Framework. This includes efficient, thread-safe, generic, immutable, and persistent stacks, maps, vectors, sets, and bags, compatible with their Java Collections counterparts.
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Persistent and immutable datatypes are increasingly appreciated as a simple, design-friendly, concurrency-friendly, and sometimes more time- and space-efficient alternative to mutable datatypes. [Less]
Immutable DataTable implementation in Scala.
Scala DataTable is a lightweight, in-memory table structure written in Scala. The implementation is entirely immutable. Modifying any part of the table, adding or removing columns, rows, or individual cell values will create and return a new structure
... [More], leaving the old one completely untouched. This is quite efficient due to structural sharing. [Less]
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