how to use the identity function from the rxjs library in typescript

To use the identity function from the rxjs library in TypeScript, you first need to import it from the library:

index.ts
import { identity } from 'rxjs';
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Once you've imported the identity function, you can use it in your code like any other function. The identity function simply returns its argument unchanged, so it's useful in cases where a function is required but no actual processing needs to be done on the input:

index.ts
const myValue: number = 42;
const result: number = identity(myValue); // result is now 42
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