Generic factory parameters in Typescript

Question

This is the sample from the official Typescript documentation for a generic factory. In this sample the constructor does not take parameters.

function create         


        

Answer 1

This is what I would do:

module Factory {
    export function createInstance(ctor: { new (raw: K): T }, data: K): T {
        return new ctor(data);
    }
}
var raw1 = { Foo: "foo" } as IRaw1;
var d1 = Factory.createInstance(Wibble, raw1);

var raw2 = { Foo: "foo", Bar: "bar" } as IRaw2;
var d2 = Factory.createInstance(Wobble, raw2);

If your constructors need more arguments, then just add them to the one object you're passing to the ctor, this way you won't need to add more generic constraints per argument.