April 2018
Beginner
536 pages
13h 21m
English
Content preview from Learning TypeScript 2.x - Second Edition
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Structural type system
In the type system of a programming language, a type is an object with a name and a structure. Some types have very simple data structures (such as primitives) while others use complex structures (such as classes).
The type system can use two different strategies to validate that a given value matches the desired type:
- Nominal type system: In this type system, values are matched against a type by its name
- Structural type system: In this type system, values are matched against a type by its structure
The TypeScript type system is a structural type system because the values are matched against a type by its structure, as the following code snippet demonstrates:
interface Person { name: string; surname: string; } function ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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