hasOwnProperty vs propertyIsEnumerable

Question

Can anyone enlighten me, what is the difference between hasOwnProperty and propertyIsEnumerable:

Answer 1

Simply stated:

hasOwnProperty will return true if and only if the property is the property of the object and is not inherited. This one is simple.

and

propertyIsEnumerable will return true if and only if hasOwnProperty returns true and the property is enumerable. So propertyIsEnumerable is one "additional requirement" on top of the hasOwnProperty test, and the name propertyIsEnumerable would be more accurate if it is hasOwnPropertyAndIsEnumerable.

demo: http://jsfiddle.net/aby3k/