var noop = function() {};

var identity = function(foo) {
  return foo;
};

function println(value: string);

function getArray(): number[] {
  return [1, 2];
}

type Foo = {
    functionInFoo(): void;
};

const good = () => 0;
const good = (x) => 0;
const bad = (a => [...a, b]);
const bad = (_ => doSomething());
const bad = (() => 0);
const bad = ((a, b) => [...a, b]);
const array = [1, 2, 3].reduce<number[]>((acc, next) => [...acc, next], []);
const bad = ((a=2, b=5) => [...a, b]);
sides.every((length,width=(3+2+(4/5))) => length > 0 );

