nthArg
INFO
This function is only available in es-toolkit/compat for compatibility reasons. It either has alternative native JavaScript APIs or isn’t fully optimized yet.
When imported from es-toolkit/compat, it behaves exactly like lodash and provides the same functionalities, as detailed here.
Creates a function that retrieves the argument at the specified index n.
If n is negative, the nth argument from the end is returned.
Signature
typescript
function nthArg(n: number): (...args: any[]) => unknown;Parameters
n(number): The index of the argument to retrieve. If negative, counts from the end of the arguments list.
Returns
((args: any[]) => unknown): A new function that returns the argument at the specified index.
Examples
typescript
const getSecondArg = nthArg(1);
const result = getSecondArg('a', 'b', 'c');
console.log(result); // => 'b'
const getLastArg = nthArg(-1);
const result = getLastArg('a', 'b', 'c');
console.log(result); // => 'c'