Combined Comparison / “Spaceship” Operator (<=>) in Javascript?

Question

Ruby has something called a Combined Comparison or \"Spaceship\" Operator, it looks like this: <=>

It does the following:

a <=>          


        

Answer 1

from: http://sabrelabs.com/post/48201437312/javascript-spaceship-operator

improved version:

function spaceship(val1, val2) {
  if ((val1 === null || val2 === null) || (typeof val1 != typeof val2)) {
    return null;
  }
  if (typeof val1 === 'string') {
    return (val1).localeCompare(val2);
  } else {
    if (val1 > val2) {
      return 1;
    } else if (val1 < val2) {
      return -1;
    }
    return 0;
  }
}

Answer 2

As far as I know there is no such operator in JavaScript but you can use Math.sign() function:

Math.sign(a - b);

NOTE: As was mentioned in comments, Math.sign() is not currently supported by all browsers. Check for compatibility (MDN).