~/talk

Programming Safely in an Uncertain World

Talkat ReactiveConf 2018 · 2018-10-29..10-31· [javascript, developer-experience]

speaker

name:David Chambers

website:https://davidchambers.me

resources

video:https://youtu.be/a2astdDbOjk

slides:none on file

summary

Claims that algebraic data types let code collapse multiple failure modes into a single result and avoid exceptions, demonstrated with Maybe type and composition via map/chain (flatMap). Uses Sanctuary and sanctuary-def inside the node Ripple REPL to parse JSON, validate X/Y/Z as an array of strings, map safe hex parsing, use sequence to turn maybes into a single maybe and sum the results. Constructs a pipeline that handles about seven failure cases and returns Just [1,2,3] (then the sum).

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