Question

How can I count number of steps between different numbers.

I have a method that takes a number and runs a code snippet with the number. I need to see if the number is the number right next to the other or two steps, three steps, four steps over or below etc.

Ex. I send a number of 1 to the method. The next number sent is 4. I then need to find out how many steps over one it is etc in this case 3 steps over 1 should be the result.

Any clues?

Answer 1

You can use a function with a closure:

var value = (function() {
  var previousValue = null;
  return function(id) {
      if (previousValue !== null) {
          if(previousValue >= id) {
              alert("Difference: -" + (previousValue - id));
          }
          else alert("Difference: +" + (id - previousValue));
      }
    previousValue = id;
  };
})();

See an example fiddle here.