variable-alias

C++ variable alias - what's that exactly, and why is it better to turn if off?

I've read the essay Surviving the Release Version. Under the "Aliasing bugs" clause it says: You can get tighter code if you tell the compiler that it can assume no aliasing.... I've also read Aliasing (computing). What exactly is a variable alias? I understand it means using a pointer to a variable is an alias, but, how/why ...

Alias for array or hash element in Ruby

Example for array arr = ["a", "b", "c"] # TODO create an alias for arr[1] as x x = "X" # arr should be ["a", "X", "c"] here Example for hash hash = { :a => "aaa", :b => "bbb" , :c => "ccc" } # TODO create an alias for hash[:b] as y y = "YYY" # hash should be { :a => "aaa", :b => "YYY" , :c => "ccc" } here And also an alias for a v...