text: ["a", "ab", "abc"].map(s => s.length);
  setInterval(() => ++cnt, 1000);
  setTimeout(() => { alert("Wake up!"); }, 60000);
  
  [a, ...as];
  new Array(...elts);
  
  function f([x, y]) {
  	var [a, [, c]] = x;
  	try {
  		throw [a, c];
  	} catch (d) {
  		console.log(d);
  	}
  }
  
  function g({ x, y: z }) {
  	var { [x]: w } = z;
  	return w;
  }
  
  function* foo(n){
  	while(n-->0)
  		yield n;
  	yield* foo(1);
  }
  
  function bar(x, y=x+19) {}
  