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  • Fermat vs Eratosthenes

    Apr 2, 2017 coding haskell

    I was thinking about Fermat’s Little Theorem and I wondered whether this primality test could be used to generate prime numbers faster than the Sieve of Eratosthenes, which is typically used to market Haskell to imperative programmers.

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  • Automate Your Expenses Without Telling Your Employer

    Dec 4, 2016 coding javascript haskell

    There is nothing more frustrating than spending time dealing with expenses since it is an activity that adds zero value to our customers and contributes nothing to our personal development. In short, doing expenses is an utter waste of time. In this post I show how I automated my expenses using Expensify and Greasemonkey.

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  • Exploring Event Sourcing and Related Patterns in Haskell

    Oct 9, 2016 architecture coding haskell

    In this article we explore the Event Sourcing Pattern and its cousins (Retroactive Event, Parallel Models and Materialised View) using a Haskell model to investigate the implications of implementing said patterns and the challenges that arise from their use. In particular, we note that the Retroactive Pattern is difficult to implement in an efficient manner whenever the possibility of inserting an arbitrary number of “missed” events between existing events is desirable.

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  • Command and Query Responsibility Segregation (CQRS) Pattern

    Aug 28, 2016 architecture coding haskell

    The Command and Query Responsibility Segregation (CQRS) Pattern is a solution to the problems that are inherent to the Create, Read, Update and Delete (CRUD) approach to data handling. We use Haskell to explore the problem scope and the proposed solution described by the pattern.

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Ernesto Garbarino

Enterprise Architect, Technologist, Author

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