JavaScript Object replication

Recent projects because of fear of data pollution , so the use of JS object replication

JS objects are inherited from object, is a reference type, so can not be copied by the = number

So we have compiled some common methods of replication, as follows

I. Creating a new object through JSON serialization and deserialization

1 var obj = {a:1, B: ' 2 ' }; 2 var newObj = Json.parse (json.stringify (obj));

Test it:

OBJ.A = 3; // obj and NEWOBJ point to different references, so the B property of NEWOBJ does not change console.log (NEWOBJ);
Console.log (obj);

Test results:

However, this method cannot be deeply copied and cannot be copied to the function property. Then we have the following deep copy method.

Second, deep object replication

function Clone (o) {    var s = {};      for (var in o)         typeof O[k] = = = ' object '? Clone (O[k]): o[k];     return s;}

Test a wave:

var obj = {    1,    ' B ',    false,    new Date (),     1 },    function () {Console.log (this. g)},    g: [1, 2]}; var newObj = Clone (obj); Console.log (NEWOBJ);
NEWOBJ.F ();

Test results:

Second, the fast copy of array

Array.prototype.concat can stitch two arrays and return new objects, and with this feature, you can quickly copy an array

var arr1 = [1]; var arr2 = [].concat (ARR1);

Test a wave:

JavaScript Object replication