Why is foo.hasOwnProperty('__proto__') equal to false?
44671
Where the property "__proto_" is stored?
49796
How to access object properties with names like integers?
3941
What's the difference between ".equals" and "=="?
110074
What is the difference between == and equals() in Java?
154049
why does if("string") evaluate "string" as true but if ("string"==true) does not?
131726
How to make primitive type properties Optional?
89550
Crockford's Prototypal inheritance - Issues with nested objects
94211
Why is reassigning Object.prototype not working?
141197
In JavaScript, is there an easier way to check if a property of a property exists?
109514
javascript: find the prototype object to which a property belongs
19007
How to check if an object is an instance of a namedtuple?
105443
What equivalent code is synthesized for a declared property?
29684
How to check if an object is nullable?
124078
generic function with a "has property X" constraint?
1469
Is there a difference between "==" and "is"?
36929
Why does comparing strings using either '==' or 'is' sometimes produce a different result?
129358
Property vs Instance Variable