Fill in blanks in a time series in Javascript where the range of the data is "00"-"23"

input.json

[{"total":16,"sent_hour":"08"},{"total":16,"sent_hour":"09"},{"total":24,"sent_hour":"10"},{"total":14,"sent_hour":"11"},{"total":6,"sent_hour":"12"},{"total":22,"sent_hour":"13"},{"total":32,"sent_hour":"14"},{"total":14,"sent_hour":"15"},{"total":10,"sent_hour":"16"},{"total":10,"sent_hour":"17"},{"total":4,"sent_hour":"18"},{"total":8,"sent_hour":"20"},{"total":6,"sent_hour":"21"},{"total":20,"sent_hour":"22"},{"total":2,"sent_hour":"23"}]

output.json

[{"sent_hour":"00","total":0},{"sent_hour":"01","total":0},{"sent_hour":"02","total":0},{"sent_hour":"03","total":0},{"sent_hour":"04","total":0},{"sent_hour":"05","total":0},{"sent_hour":"06","total":0},{"sent_hour":"07","total":0},{"total":16,"sent_hour":"08"},{"total":16,"sent_hour":"09"},{"total":24,"sent_hour":"10"},{"total":14,"sent_hour":"11"},{"total":6,"sent_hour":"12"},{"total":22,"sent_hour":"13"},{"total":32,"sent_hour":"14"},{"total":14,"sent_hour":"15"},{"total":10,"sent_hour":"16"},{"total":10,"sent_hour":"17"},{"total":4,"sent_hour":"18"},{"sent_hour":"19","total":0},{"total":8,"sent_hour":"20"},{"total":6,"sent_hour":"21"},{"total":20,"sent_hour":"22"},{"total":2,"sent_hour":"23"}]

verbose.js

function makeHourRange(num) {
  return num < 10 ? "0" + num.toString() : num.toString();
}

function fillBlanks(ourHours, rawData) {
  var ourData = Array();
  alert(JSON.stringify(rawData));
  for (hour in ourHours)
  {
    var hourString = makeHourRange(hour);
    var found = false;
    for(x in rawData)
    {
      if(rawData[x]['sent_hour'] == hourString)
      {
        found = true;
        break;
      }
    }
    if(found == true)
    {
      ourData.push(rawData[x]);
    }
    else
    {
      ourData.push({'sent_hour': hourString, 'total': 0})
    }
  }
  return ourData;
}

var rawData = {{ chart_json|safe }};
var hourRange = d3.range(0,24);
alert(hourRange); //["00","01",.."23"]
var filledData = fillBlanks(hourRange, rawData);
alert(JSON.stringify(filledData));