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Like all good ideas in type theory, existential types have been around for a long time but are rarely used or given the prominence they deserve. Existential types offer a powerful mechanism for developers to create rich and completely type-safe data structures and APIs that are otherwise impossible to express.
In this lightening talk, Nick will share with you what existential types are, how it's possible to represent them in F# and give some practical examples of where you might find them useful.
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Professional F# developer by day, amateur type theorist by night, Nick enjoys drawing ideas from the world of functional programming to create robust and safe software for the finance industry.