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

bonfire-truncate-a-string.js

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

function truncate(str, num) {
  // Clear out that junk in your trunk
 
  if (num <=3) {
    return str.slice(0, num) + "...";
  } else if(num >= str.length) {
    return str;
  } else {
  var result = str.slice(0, num-3);
 return result + "...";
  
  }
}

truncate("A-tisket a-tasket A green and yellow basket", 11);
truncate("A-", 1);