var AddAt = function (array, item, index, limit, callback, context){ 
if (index === undefined) { 
index = 0; 
} 
if (context === undefined) { 
context = array; 
} 
if (limit) { 
var remaining = limit - _AN_Read_length('length', array); 
if (remaining <= 0) { 
return null ; 
} 
} 
if (!Array.isArray(item)) { 
if (array.indexOf(item) === -1) { 
array.splice(index, 0, item); 
if (callback) { 
callback.call(context, entry); 
} 
return item; 
} 
 else { 
return null ; 
} 
} 
var itemLength = _AN_Read_length('length', item) - 1; 
while (itemLength >= 0){ 
if (array.indexOf(item[itemLength]) !== -1) { 
item.pop(); 
} 
itemLength-- ; 
} 
itemLength = _AN_Read_length('length', item); 
if (itemLength === 0) { 
return null ; 
} 
if (limit && itemLength > remaining) { 
item.splice(remaining); 
itemLength = remaining; 
} 
for (var i = itemLength; 
i > 0; i-- ){ 
var entry = item[i]; 
array.splice(index, 0, entry); 
if (callback) { 
callback.call(context, entry); 
} 
} 
return item; 
} 
; 
module.exports = AddAt;