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!
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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
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