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Chris Phelps

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Type Parameter Power-Up! Variance, Bounds, and InferenceScala Days New York 20182018-06-19
A practical tour of Scala variance and bounds shows when the compiler refuses code (example error covariant type A occurs in contravariant position) and how to…
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Type Parameter Power Up Variance Bounds and InferenceScala Days Berlin 20182018-05-14
A practical walk through why Scala’s variance rules matter: a real system uses a free monad workflow and hits the error covariant type A occurs in…
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The Futures are Calling and I Must ChooseScale By the Bay 20172017-11-16
Compares concrete async primitives: Scala Futures use an ExecutionContext (global fork/join pool) and submit each map/flatMap as runnables, Twitter Futures…
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Chris Phelps InterviewScale By the Bay 20172017-11-16
Platform teams at Tendril wrestle with analytics at scale by balancing heavy batch jobs that spike load against live, low-latency user queries, and describe…
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The Futures are Calling and I Must ChooseScala Days Copenhagen 20172017-05-30
Compares Scala Futures, Twitter Futures, Guava ListenableFutures, Java CompletableFutures and lazy Tasks (Scalaz/Monix/FS2) with concrete interoperability code…
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