Add Hash Table for future implementation "find by".

Add Chaining children arrays;

chain.js

@@ -1,100 +1,130 @@
 function Chain(items) {
+    "use strict";
 
-	var _index = 0;
+    var _index = 0;
 
-	var _items = items.slice(0) || [];
+    var _items = items.slice(0) || [];
+    var _hashTable = [];
 
-	function _next() {
-		_index++;
+    //Wraping all arrays at items into chain
+    for (var index in _items) {
 
-		_index = _index > _items.length - 1 ? 0 : _index;
+        var hash = getHash(_items[index]);
+        _hashTable[hash] = _items[index];
 
-		return _items[_index];
-	}
+        for (var i in _items[index]) {
+            if (Array.isArray(_items[index][i])) {
+                _items[index][i] = Chain(_items[index][i]);
+            }
+        }
+    }
 
-	function _prev() {
+    function getHash(obj) {
+        var hash = btoa(JSON.stringify(obj));
 
-		_index--;
+        return hash.substr(Math.random() * 100, 5);
+    }
 
-		_index = _index < 0 ? _items.length - 1 : _index;
+    function _next() {
+        _index++;
 
-		return _items[_index];
-	}
+        _index = _index > _items.length - 1 ? 0 : _index;
 
-	function _first(item) {
+        return _items[_index];
+    }
 
-		if (item) {
-			_items[0] = item;
-		}
+    function _prev() {
 
-		return _items[0] || undefined;
-	}
+        _index--;
 
-	function _last(item) {
-		if (item) {
-			_items[_items.length - 1] = item;
-		}
+        _index = _index < 0 ? _items.length - 1 : _index;
 
-		return _items[_items.length - 1];
-	}
+        return _items[_index];
+    }
 
-	function _reset() {
-		_index = 0;
-		return _current();
-	}
+    function _first(item) {
 
-	function _isBegin() {
-		return _index === 0;
-	}
+        if (item) {
+            _items[0] = item;
+        }
 
-	function _isEnd() {
-		return _index == (_items.length - 1);
-	}
+        return _items[0] || undefined;
+    }
 
-	function _current() {
-		return _items[_index];
-	}
+    function _last(item) {
+        if (item) {
+            _items[_items.length - 1] = item;
+        }
 
-	function _beginFrom(index) {
-		var newArray = _items.slice(index);
+        return _items[_items.length - 1];
+    }
 
-		for (var i = index; i < _items.length; i++) {
-			newArray.push(_items[i]);
-		}
-		return Chain(newArray);
-	}
+    function _reset() {
+        _index = 0;
+        return _current();
+    }
 
-	function _getIndex() {
-		return _index;
-	}
+    function _isBegin() {
+        return _index === 0;
+    }
 
-	function _getItems() {
-		return _items;
-	}
+    function _isEnd() {
+        return _index == (_items.length - 1);
+    }
 
-	function _goTo(index) {
-		_index = index;
-		return _current();
-	}
+    function _current() {
+        return _items[_index];
+    }
 
-	function _goToEnd() {
-		_index = _items.length - 1;
-		return _current();
-	}
+    function _beginFrom(index) {
+        var newArray = _items.slice(index);
 
-	return {
-		next     : _next,
-		prev     : _prev,
-		current  : _current,
-		first    : _first,
-		last     : _last,
-		reset    : _reset,
-		isEnd    : _isEnd,
-		isBegin  : _isBegin,
-		goTo     : _goTo,
-		goToEnd  : _goToEnd,
-		getItems : _getItems,
-		beginFrom: _beginFrom,
-		getIndex : _getIndex
-	};
+        for (var i = index; i < _items.length; i++) {
+            newArray.push(_items[i]);
+        }
+        return Chain(newArray);
+    }
+
+    function _getIndex(item) {
+        if (item) {
+            var hash = generateHash(item);
+
+        }
+        return _index;
+    }
+
+    function _getItems() {
+        return _items;
+    }
+
+    function _goTo(index) {
+        _index = index;
+        return _current();
+    }
+
+    function _goToEnd() {
+        _index = _items.length - 1;
+        return _current();
+    }
+
+    function _getHashTable() {
+        return _hashTable;
+    }
+
+    return {
+        next        : _next,
+        prev        : _prev,
+        current     : _current,
+        first       : _first,
+        last        : _last,
+        reset       : _reset,
+        isEnd       : _isEnd,
+        isBegin     : _isBegin,
+        goTo        : _goTo,
+        goToEnd     : _goToEnd,
+        getItems    : _getItems,
+        beginFrom   : _beginFrom,
+        getIndex    : _getIndex,
+        getHashTable: _getHashTable
+    };
 }