Moved "Parameter Properties" section above "this Types"

[adriancuadrado]

In the this-based type guards subsection of the this Types section there is an example that uses a parameter property. This may confuse readers that are reading this article from top to bottom since you are using a feature that has not been explained yet.

[adriancuadrado]

This is the example code that uses parameter properties:

class FileSystemObject {
  isFile(): this is FileRep {
    return this instanceof FileRep;
  }
  isDirectory(): this is Directory {
    return this instanceof Directory;
  }
  isNetworked(): this is Networked & this {
    return this.networked;
  }
  constructor(public path: string, private networked: boolean) {}
}

This code is used in this-based type guards, but it is in the next section, where they are actually explained.