how to remove an element from a type that is an array

Question

Is there a way to remove one of the elements from a type that is an array? I'm looking to curry something and make the whole thing easier.

E.g.

function NEW_PERSON (name : string, age : number, weight : number, height : number) {

}

function CURRIED_NEW_PERSON (name : string) {
    return function (...args : Parameters<typeof NEW_PERSON>) { // remove index 0
        return NEW_PERSON(name, ...args); // error due to 5 arguments instead of 4
    }
}

How do I remove index 0 from Parameters<typeof NEW_PERSON>?

Answer 1

We can create a utility type which extracts every element except the first one from a tuple using infer.

type ExceptFirst<T extends any[]> = 
  Parameters<typeof NEW_PERSON> extends [any, ...infer REST] 
    ? REST 
    : never

function CURRIED_NEW_PERSON (name : string) {
    return function (...args : ExceptFirst<Parameters<typeof NEW_PERSON>>) {
        return NEW_PERSON(name, ...args);
    }
}

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