Somewhat useless typescript code for generic but maybe useful in the future

GenericSignature.ts

const typePattern = /\s(.*)\]/;

interface GenericTaggable {
  [Symbol.toStringTag]: string;
}

interface DefaultConstructible<T> {
  new (): T;
}

function createSignature(value: any) {
  return '<' + typePattern.exec(Object.prototype.toString.call(value))![1].toLowerCase() + '>'
}

class Factory<T> {
  constructor(private ctor: new () => T) {}
  getInstance(): T {
    return new this.ctor();
  }
}

function factory<T>(t: DefaultConstructible<T>): T {
  return new t();
}

Usage:

console.log(createSignature(true));       // <boolean>
console.log(createSignature(1));          // <number>
console.log(createSignature('asdf'));     // <string>
console.log(createSignature([1, 2, 3]));  // <array>