Filtering function for stock rows

gistfile1.js

/** Returns a new array of valid stock rows, given the input selections
 * slimStockArray: the starting list of stocks, to be filtered
 * keyOrder: mapping of keys to its index in slimStockArray, ex: {'color':0,'d3':1,'d4':2,'onhand':3}
 * selections: object with the current user's selections, ex: {'color':'3', 'd4':'60425'}
 **/
function filter(slimStockArray, keyOrder, selections) {
  var result = new Array();
  
  for(var i=0; i<slimStockArray.length; i++) {
    var row = slimStockArray[i];
    var valid = true;
    for(key in selections) {
      // determine the array index for the given selection key
      var idx = keyOrder[key];
      var val = row[idx];
      
      // check whether the user's selection matches the current stock row's value
      var selectedVal = selections[key];
      if(val!==selectedVal) {
        valid = false;
      }
    }
    if (valid) {
      result.push(row);
    }
  }
  return result;
}

// If the customer further narrows down their selection, you could use the returned value as the input for the next slimStockArray
// so that you don't have to filter through the entire full list again

// This could also be modified to just return a list of the various sets of valid values, given the selections already made
{ 
  color: 
   { '136': true,
     '1413': true,
     '4885': true,
     '15874': true }
  d4: 
    { '60425': true}
}