emilioberto/Angular-Playground

Angular playground

Primitive types extensions

interface String {
    isNullOrEmpty(this: string): boolean;
  }

  interface Array<T> {
    isNullOrEmpty(this: Array<T>): boolean;
    emptyIfNull(this: Array<T>): Array<T>;
  } 

Global functions

function emptyIfNull<T>(arr: Array<T>): Array<T>;