Hasty Treat - Records and Tuples in JavaScript

In this Hasty Treat, Scott and Wes talk about records and tuples in javascript — what they are, why you might want to use them, and more! LogRocket - Sponsor LogRocket lets you replay what users do on your site, helping you reproduce bugs and fix issues faster. It’s an exception tracker, a session re-player and a performance monitor. Get 14 days free at logrocket.com/syntax. Show Notes ??? - 02:42 - Immutability 05:08 - Records • Immutable object • Syntax #{x: 1, y: 2} 05:56 - Tuples • Immutable array • Syntax #[1,2,3,4] 07:18 - For both •

Referred to as a compound primitive • •

Can contain only primitives, not objects • •

They are compared deeply by their contents rather than their identity • assert(#{ a: 1 } === #{ a: 1 }); assert(#[1, 2] === #[1, 2]); assert(#{ a: 1, b: 2 } === #{ b: 2, a: 1 }); •

Potential for optimizations •

• Optimizations for making deep equality checks fast • Optimizations for manipulating data structures • •

Works well with type systems • •

Better integration with the debugger • •

Accessed through normal record.scott object like syntax • 13:39 - Stage 2 Links • https://github.com/tc39/proposal-record-tuple Tweet us your tasty treats! • Scott’s Instagram • LevelUpTutorials Instagram • Wes’ Instagram • Wes’ Twitter • Wes’ Facebook • Scott’s Twitter • Make sure to include @SyntaxFM • in your tweets