Ways to manipulate objects in JavaScript

With determines the area of an object's scope, the properties or methods of the secondary object within the with code snippet can be used directly.

Cases:

// For example, there are name,age properties and walk methods in Stu. With (Stu) {    alert (name+"  "+age);   that is to omit the stu.name of this type of call     Walk ();   }

In the convenience of object or array, convenient object return object property of variable name, convenient array return array of the script

Cases:

// stu.name= "Lisi"; stu.age=12;  for inch Stu) {    alert (stu[s]);} // the print out is lisi12 // var arr = [3,2,5,3];  for inch Stu) {    alert (stu[s]);} // the print out is 0123

Ways to manipulate objects in JavaScript