functional-constructs-types

What problem does it solve?

TypeScript developers often lose type information when using imperative loops. This skill shows how functional constructs like map, filter, and reduce keep types flowing through data transformations, reducing manual type annotations and errors.

Core Features & Use Cases

• Preserve type information across transformation chains using map, filter, and reduce.
• Easier reasoning about data shapes and follow-on operations with type inference.
• Real-world scenarios include transforming arrays, filtering data, and aggregating results in a type-safe way.

Quick Start

Convert a loop that builds a list into a functional chain, for example use items.map(item => item.name) instead of a for loop.