javascript / es2015: should functions returning multiple, separate values return an object or tuple (array)?

objects-vs-tuples.js

// This function returns 2 separate values via an object with 2 properties.
function returnTwoValuesObj(str) {
  const length = str.length;
  const hasSpaces = str.indexOf(' ') !== -1;
  return {length, hasSpaces};
}

// This function returns 2 separate values via an array (effectively a tuple) with 2 items.
function returnTwoValuesTuple(str) {
  const length = str.length;
  const hasSpaces = str.indexOf(' ') !== -1;
  return [length, hasSpaces];
}

// My questions:
// Which of the following would you rather write?
// If you don't like either of the following, how would you write it?

function withObj() {
  const helloStr = 'hello';
  const {length: helloLength, hasSpaces: helloHasSpaces} = returnTwoValuesObj(helloStr);
  console.log(helloStr, helloLength, helloHasSpaces);
  
  const helloWorldStr = 'hello world';
  const {length: helloWorldLength, hasSpaces: helloWorldHasSpaces} = returnTwoValuesObj(helloWorldStr);
  console.log(helloWorldStr, helloWorldLength, helloWorldHasSpaces);
}

function withTuple() {
  const helloStr = 'hello';
  const [helloLength, helloHasSpaces] = returnTwoValuesTuple(helloStr);
  console.log(helloStr, helloLength, helloHasSpaces);
  
  const helloWorldStr = 'hello world';
  const [helloWorldLength, helloWorldHasSpaces] = returnTwoValuesTuple(helloWorldStr);
  console.log(helloWorldStr, helloWorldLength, helloWorldHasSpaces);
}