A common method to clone objects and arrays in JS _javascript tips

Ext's two methods of cloning:

You can clone objects, data, and so on: var Newjson = Ext.clone (JSON);
Only arrays can be cloned: var Newjson = Ext.Array.clone (JSON);

The jquery approach:

Deep copy "can iterate": var Newjson = Jquery.extend (true,{}, JSON);
Shallow copy "Cannot iterate": var Newjson = Jquery.extend ({}, JSON);

var Newjson = $.map (Json,function (n) {return n;});

Array Cloning method:

Copy Code code as follows:

var Newjson = Json.concat ();
var Newjson = json.splice (0);

These methods are to copy a new object or array, but if the parent "IFRAME situation" in the way to the parents of the object of the problem "there is a reference relationship", you need to pay attention to the way to transfer data.