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
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Referred to as a compound primitive
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Can contain only primitives, not objects
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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
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Works well with type systems
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Better integration with the debugger
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Accessed through normal record.scott object like syntax
13:39 - Stage 2
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