identity - API reference

API reference › @evolu/common › Function › identity

function identity<A>(a: A): A;

Defined in: packages/common/src/Function.ts:109

Returns the value unchanged.

Useful as a default transformation, placeholder callback, or when a function is required but no transformation is needed.

Example

const values = [1, 2, 3];
const same = values.map(identity); // [1, 2, 3]

const getTransform = (shouldDouble: boolean) =>
  shouldDouble ? (x: number) => x * 2 : identity;