As many small and big companies, organizations try to develop their own blockchain technologies IBM has developed its own. It is called Hyperledger, which originally was the closed source code project. But somehow IBM decided to make it open source and share its vision regarding to blockchain technolgies. Hyperledger is the collection of the projects that are devoted for blockchain. Private blockchain comes as a main keyword when we talk about HyperLedger, which is different than Ethereum or Bitcoin networks. It is particularly oriented to be deployed in a single organization, or in a consorcium of organizations. It can be configured in a whatever way they want. The speed can be top high compared to other existing blockchain technologies.

Some usefull collection of notes regarding to Java memory management has been collected. You can refer to some of them for quick remainder

We are continuing our Domain-Driven Design related chapters, and here I’ve tried to describe my understadings regarding to Repositories in the DDD. Repositories are easily confused with Factory patterns, while the main difference is that Factory Pattern does not provide persistency. Lets just dive into repository topic which starts with retrieving objects.

What is Aggregate ?

Original definition of the problem is given at projecteuler.net, as always hackerrank definition of the problem is more complicated an challenging.