Hasty Treat - Records and Tuples in JavaScript
source link: https://syntax.fm/show/287/hasty-treat-records-and-tuples-in-javascript
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Sep 28th, 2020
Hasty Treat - Records and Tuples in JavaScript
👇 Download Show✏️ Edit Show NotesIn 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
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