39, Property traversal

Find out if object obj is not on the prototype chain (note that there is also a space behind the colon of the test example)
1, returns the array, the format is Key:value
2, the result array does not require the order
Enter an example:

var C = function () {This.foo = ' bar '; this.baz = ' Bim ';}; C.prototype.bop = ' Bip '; Iterate (new C ());

Output Example:

["Foo:bar", "Baz:bim"]

Method One: for...in + hasownproperty can use for-in to traverse the properties in the object, hasOwnProperty method can return a Boolean value, Indicates whether an object has a property of the specified name。 This method cannot check whether the object's prototype chain has this property, which must be a property of the object itself.

function iterate (obj) {
     var arr = [];
     Use For-in to traverse object Properties
     for (var key in obj) {
         //To determine whether the key is the property of the object itself
         if (Obj.hasownproperty (key)) {
             // Store attributes and values in an array by format
             Arr.push (key+ ": +obj[key]);
         }
     return arr;
 }

Method Two:

function iterate (obj) {return
    object.getownpropertynames (obj). Map (function (key) {return
        key+ ":" +obj[key ];
    });
}