http://www.freecodecamp.com/robertsheacole 's solution for Bonfire: Truncate a string

bonfire-truncate-a-string#.js

// Bonfire: Truncate a string
// Author: @robertsheacole
// Challenge: http://www.freecodecamp.com/challenges/bonfire-truncate-a-string#
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function truncate(str, num) {
	
	var dots = "...";
	var empty = "";

	if (str.length <= 2) {
      num = num - 1;
      return str.slice(num, -1) + dots;
    } else if (str.length > num && num > 3) {
		num = num - 3;
		return str.slice(0, num) + dots;
	} else if (str.length == num && num > 3){
		return str;
    } else if (str.length < num && num > 3) {
		return str;
	} else if (num <= 2){
        return str.slice(0, num) + dots;
    } else {
       return empty; 
    }

}
console.log(truncate("A-", 1));