LEARNING ELIXIR AS AN IOS ENGINEER

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FOREWORD

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> Preferring polling over socket connections in a realtime app setting (chat, food delivery, ride sharing etc)

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> Preferring polling over socket connections in a realtime app setting (chat, food delivery, ride sharing etc)

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> Preferring polling over socket connections in a realtime app setting (chat, food delivery, ride sharing etc) > Pagination mechanisms based on page # in a mobile app

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> Preferring polling over socket connections in a realtime app setting (chat, food delivery, ride sharing etc) > Pagination mechanisms based on page # in a mobile app

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> Preferring polling over socket connections in a realtime app setting (chat, food delivery, ride sharing etc) > Pagination mechanisms based on page # in a mobile app > Dealing with the intricacies of Apple’s own server side APIs.

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> What makes a second language so hard? > The genesis of this choice > Why didn’t I go with Server Side Swift, which should’ve been a better fit? > What makes Elixir so good? > A brief history of the language > What parts of elixir really confounded me as someone coming from Swift

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> Features in Elixir I absolutely would love if they came to Swift.

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> Features in Elixir I absolutely would love if they came to Swift.

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> Features in Elixir I absolutely would love if they came to Swift. > We’ll look at some really cool features in the Elixir ecosystem that make it really unique

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> Features in Elixir I absolutely would love if they came to Swift. > We’ll look at some really cool features in the Elixir ecosystem that make it really unique

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> Features in Elixir I absolutely would love if they came to Swift. > We’ll look at some really cool features in the Elixir ecosystem that make it really unique > Suggested QA - what is it like learning a second language? > What’s a good way to deep dive into a new technology as a junior developer

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WHAT MAKES A SECOND LANGUAGE SO HARD? > One of the most challenging but rewarding things you can do as a developer > Idioms & Syntax - How do we do things? > Tooling > New ways of thinking

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THE GENESIS OF THIS CHOICE:

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NEW AND SHINY

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MULTI CORE

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THE BEAM VIRTUAL MACHINE IS ROCK SOLID AND HAS POWERED CELLULAR NETWORKS FOR YEARS

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THE EARLY ADOPTER STORIES ARE RIDICULOUSLY POSITIVE

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THE TOOLING

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WHY DIDN’T I GO WITH SERVER SIDE SWIFT, WHICH SHOULD’VE BEEN A BETTER FIT?

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> Tooling

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> Tooling

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> Tooling > Foundation is still immature

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> Companies using server side swift in production are doing it sparingly

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> Still very immature

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> Companies that use it are never heard from again

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WHAT MAKES ELIXIR SO GOOD? > Functional > Concurrent > Pragmatic

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STRUCTS > Elixir Structs are a lot like Swift structs, except no methods allowed - pure functions only!!! > They're pure data - interesting emergent properties! > Want to update a property? It's as easy as updating a dictionary(because they're dictionaries underneath!)

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NO DISTINCTION BETWEEN REMOTE AND LOCAL DATA > Distributed first - things like ETS can run on other computers or the same computer and your code won't know the difference. Erlang did docker-compose before it was cool > Same for structs, data, processes - makes it easy to horizontally scale your system

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> Also works for tooling! iex, observer all run as natively locally and remotely! > (Remember our little video?)

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SIMPLE THINGS ARE SIMPLE

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SIMPLE THINGS ARE SIMPLE > Service calls out to x APIs, collects responses and does something with them?

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ASYNC-AWAIT

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WHY WAIT ?

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THE ELIXIR VERSION

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STUFF IN ELIXIR I FOUND CONFUSING > Recursively descending a list! [head | tail] = list

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FEATURES IN ELIXIR I'D REALLY LOVE IF THEY CAME TO SWIFT

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DOCTESTS

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PIPE OPERATOR!

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COOL DEMOS > Remote debugging > Observer

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CONCLUSION > Dynamic Typing/Languages aren't bad/inferior. > Learning a new language is often rewarding.