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createAdapter()

createAdapter<FromIn, FromOut, ToIn, ToOut>(mapInput, mapOutput): Adapter<FromIn, FromOut, ToIn, ToOut>

Creates a reusable adapter from input/output mappers. The adapter can then be applied to any source function with the matching signature.

Type Parameters​

FromIn: FromIn​

The source function's input type

FromOut: FromOut​

The source function's output type

ToIn: ToIn​

The target input type

ToOut: ToOut​

The target output type

Parameters​

mapInput: (input) => FromIn​

Transforms target input into source input

mapOutput: (output) => ToOut​

Transforms source output into target output

Returns: Adapter<FromIn, FromOut, ToIn, ToOut>​

A reusable Adapter

Since​

2.4.0

Example​

// Adapter from Celsius to Fahrenheit API
const celsiusToFahrenheit = createAdapter<number, string, number, string>(
  (fahrenheit) => (fahrenheit - 32) * 5 / 9,  // °F -> °C input
  (label) => label.replace("°C", "°F"),        // output label
);

const describeCelsius = (temp: number) => `${temp.toFixed(1)}°C`;
const describeFahrenheit = celsiusToFahrenheit(describeCelsius);

describeFahrenheit(212); // "100.0°F"