Convert the given number into a roman numeral.

roman_numeral.js

function convert(num) {
  var roman_hash = { "M" : 1000, 
                     "CM" : 900,
                     "D" : 500,
                     "CD" : 400,
                     "C" : 100, 
                     "XC" : 90, 
                     "L" : 50,
                     "XL" : 40,
                     "X" : 10,
                     "IX" : 9,
                     "V" : 5,
                     "IV" : 4,
                     "I" : 1 };
  var roman = "";
  var keys = Object.keys(roman_hash);

  while( num !== 0){
    for(var i = 0; i < keys.length; i++){
      if( num / roman_hash[keys[i]] >= 1){
        for(var j = 0; j < Math.floor( num / roman_hash[keys[i]] ); j++){
          roman +=  keys[i];  
        }      
        num = num % roman_hash[keys[i]];
      }
    }
  }
  
  return roman;
}

convert(29);