Setting an undefined key of an object to undefined in JavaScript
4210
How do I remove a property from a JavaScript object?
19687
Internal "get/set" function of property?
14412
Create an empty object in JavaScript with {} or new Object()?
108666
Iterate over Object Literal Values
100693
best way to get the key of a key/value javascript object
105287
(Why) is using an uninitialized variable undefined behavior?
81043
Objects vs arrays in Javascript for key/value pairs
49805
Sort JavaScript object by key
128709
Why is there a `null` value in JavaScript?
44439
How do I loop through or enumerate a JavaScript object?
14660
Undefined variable as function argument javascript
134996
How can I temporarily disable the "return value might be undefined" warning?
142537
JavaScript Object Literals & Array Literals
144227
Assigning property to JS object using another objects property value as the property name
157654
Checking if a key exists in a JavaScript object?
64435
How do I reference a JavaScript object property with a hyphen in it?
101691
Using the field of an object as a generic Dictionary key