Common Methods for cloning objects and arrays in js

Ext can be cloned using the following methods: varnewJsonExtclone (json), varnewJsonExtclone (json), and varnewJsonExtArrayclone (json). JQuery's method: Deep copy [iterative ]: varnewJsonjQueryextend (two clone methods of tr Ext: Object cloning and data cloning: var newJson = Ext. clone (json); only Arrays can be cloned: var newJson = Ext. array. clone (json); JQuery method: Deep copy [can be iterated]: var newJson = jQuery. extend (true, {}, json); shallow copy [non-iteration]: var newJson = jQuery. extend ({}, json); var newJson = $. map (json, function (n) {return n ;}); grams of the array Method: var newJson = json. concat (); var newJson = json. splice (0); the above methods are to copy a new object or array, however, if you directly use the parent [iframe situation] method to get the object in the parent window, there will be a [Reference relationship]. Note that you can change the method to the data transmission method.