helpers.js

exports.extend = function(target) {
  var i = 1, length = arguments.length, source;
  for ( ; i < length; i++ ) {
    // Only deal with defined values
    if ( (source = arguments[i]) != undefined ) {
      Object.getOwnPropertyNames(source).forEach(function(k){
        var d = Object.getOwnPropertyDescriptor(source, k) || {value:source[k]};
        if (d.get) {
          target.__defineGetter__(k, d.get);
          if (d.set) target.__defineSetter__(k, d.set);
        }
        else if (target !== d.value) {
          target[k] = d.value;
        }
      });
    }
  }
  return target;
};

exports.array_unique = function(array) {
  var a = [];
  var l = array.length;
  for(var i=0; i<l; i++) {
    for(var j=i+1; j<l; j++) {
      // If array[i] is found later in the array
      if (array[i] === array[j])
        j = ++i;
    }
    a.push(array[i]);
  }
  return a;
};