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Raúl Raja Martínez

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Does FP still matter in the era of AI?Lambda World 20252025-10-23
Panel argues functional programming stays relevant because it yields proofs of correctness and language designs that eliminate the null problem, which AI…
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raul raja databricks meetup scala days 2023 seattle 1080pScala Days 2023 Seattle2023-06-05
An open source JVM library called Seth AI provides a monadic AI block DSL for Scala/Kotlin (published to Maven Central as an alpha) and bindings for Java…
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Arrow Fx: Functional Domain Modeling with KotlinConference for Kotliners 20202020-06-05
Builds a small app that takes a list of URLs and returns structured entities using Arrow Optics Arrow Fx and Arrow Meta on Kotlin with KotlinX coroutines. It…
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Arrow Meta - Enabling Functional Programming in the Kotlin CompilerLambda World Cádiz 20192019-10-17
Arrow Meta is a Kotlin compiler plugin library that intercepts AST and IR interception and rewrites code before type checking, generates automatic synthetic…
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Functional Programming in Kotlin with ΛrrowKotlinConf 20182018-10-03
Builds a pure, single-function Kotlin library that fetches GitHub gists into an immutable data model, uses an annotation processor to generate optics lenses…
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Architecting Typed FP Applications & Libraries in Kotlin with ArrowLambda World Seattle 20182018-09-17
Library implements a polymorphic GitHub Gist fetcher built atop Arrow and Kotlin, returning immutable models and supporting multiple effect runtimes (Rx2…
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Better types = fewer testsPamplona Software Crafters 20182018-06-08
Explains how richer static types and typed functional programming reduce the need for tests by encoding invariants in types; discusses typed FP techniques and…
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Best practices, cross-functional teams (panel)Pamplona Software Crafters 20182018-06-08
Panel discussion about best practices and cross-functional teams in professional software development, with participants Arturo Herrero, Raúl Raja and Jorge…
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Kategory: Functional Data Types & Abstraction for KotlinWeCodeFest 20182018-03-02
Kategory presents functional data types and abstractions for Kotlin, showing how to use a functional programming library in Kotlin to model and manipulate…
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Separating Behavior and Data with Type Classes in ScalaWeCodeFest 20182018-03-02
Shows how to use Scala type classes and higher-kinded types to separate behavior from concrete implementations so libraries don’t force a particular return…
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Freestyle: A framework for pure functional apps, libs and microservicesScala.IO 20172017-11-02
Freestyle 0.4.0 claims a concrete, stack‑safe way to build purely functional Scala apps and microservices: algebras get generated by Scala‑meta macros so…
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Functional Programming in Kotlin with KategoryLambda World 20172017-10-26
Kategory is a Kotlin library that ports Typelevel Scala ideas (cats) and ships ready-to-use datatypes (Option, Try, Either, IO/effects) with lawful instances…
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Freestyle: A Framework for Purely Functional FP Apps & LibsTypelevel Summit Copenhagen 20172017-06-03
Freestyle presents a concrete Scala library that puts free monads at the center, with a module system that lets you define modules and algebras and wire them…
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Scala ExercisesTypelevel Summit Philadelphia 20162016-03-02
Scala Exercises is a web-based open source platform (by 47 Degrees) that already records 63,000 unique sessions with 40% returning and about 180 PRs and 50…
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Patterns of a pragmatic functional architectureLambda World 20152015-10-24
Demonstrates a pragmatic, purely functional architecture implemented in Scala: composes domain algebras into an application via Free monads and coproducts…
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