text: /**@constructor*/
  function ChainNode(object, link) {
  	this.value = object;
  	this.link = link; // describes this node's relationship to the previous node
  }
  
  /**@constructor*/
  function Chain(valueLinks) {
  	this.nodes = [];
  	this.cursor = -1;
  	
  	if (valueLinks && valueLinks.length > 0) {
  		this.push(valueLinks[0], "//");
  		for (var i = 1, l = valueLinks.length; i < l; i+=2) {
  			this.push(valueLinks[i+1], valueLinks[i]);
  		}
  	}
  }
  
  Chain.prototype.push = function(o, link) {
  	if (this.nodes.length > 0 && link) this.nodes.push(new ChainNode(o, link));
  	else this.nodes.push(new ChainNode(o));
  };
  
  Chain.prototype.unshift = function(o, link) {
  	if (this.nodes.length > 0 && link) this.nodes[0].link = link;
  	this.nodes.unshift(new ChainNode(o));
  	this.cursor++;
  };
  
  Chain.prototype.get = function() {
  	if (this.cursor < 0 || this.cursor > this.nodes.length-1) return null;
  	return this.nodes[this.cursor];
  };
  
  Chain.prototype.first = function() {
  	this.cursor = 0;
  	return this.get();
  };
  
  Chain.prototype.last = function() {
  	this.cursor = this.nodes.length-1;
  	return this.get();
  };
  
  Chain.prototype.next = function() {
  	this.cursor++;
  	return this.get();
  };
  
  Chain.prototype.prev = function() {
  	this.cursor--;
  	return this.get();
  };
  
  Chain.prototype.toString = function() {
  	var string = "";
  	for (var i = 0, l = this.nodes.length; i < l; i++) {
  		if (this.nodes[i].link) string += " -("+this.nodes[i].link+")-> ";
  		string += this.nodes[i].value.toString();
  	}
  	return string;
  };
  
  Chain.prototype.joinLeft = function() {
  	var result = "";
  	for (var i = 0, l = this.cursor; i < l; i++) {
  		if (result && this.nodes[i].link) result += this.nodes[i].link;
  		result += this.nodes[i].value.toString();
  	}
  	return result;
  };
  
  
  /* USAGE:
  
  var path = "one/two/three.four/five-six";
  var pathChain = new Chain(path.split(/([\/.-])/));
  print(pathChain);
  
  var lineage = new Chain();
  lineage.push("Port");
  lineage.push("Les", "son");
  lineage.push("Dawn", "daughter");
  lineage.unshift("Purdie", "son");
  
  print(lineage);
  
  // walk left
  for (var node = lineage.last(); node !== null; node = lineage.prev()) {
  	print("< "+node.value);
  }
  
  // walk right
  var node = lineage.first()
  while (node !== null) {
  	print(node.value);
  	node = lineage.next();
  	if (node && node.link) print("had a "+node.link+" named");
  }
  
  */