Extending core functionality
64762
Why is extending native objects a bad practice?
100925
Does an interface by default extend Object?
80163
Overriding the functionality of back and home buttons
100029
Add context menu items to specific file extensions
100909
Difference between adding a unit to the interface or the implementation section
53358
What does it mean to extend a function?
42625
SFDC: Understanding With Sharing, Without Sharing & Unspecified Sharing Classes
35865
Can enums be subclassed to add new elements?
124531
Where on Github, or elsewhere, can I find the code for core-blocks?
144555
Working with Dynamic: Synchronization with EventActions ( and other preemptive evaluations)
114931
Extend a language with additional keywords?
134581
Extending from two classes
128067
Why is the 'this' keyword required to call an extension method from within the extended class
19966
How to customize derivative behavior via upvalues?
53282
How to enforce the 'override' keyword?
75944
Overlapping pure functions
131313
Way to expand code block