Why is `scope` planned for deprecation?

[Andrei Alexandrescu via Digitalmars-d]

On 11/21/14 12:17 AM, Paulo Pinto wrote:
> On Friday, 21 November 2014 at 02:56:09 UTC, Andrei Alexandrescu wrote:
>> On 11/20/14 5:09 PM, Walter Bright wrote:
>>> On 11/20/2014 3:10 PM, "Ola Fosheim Grøstad"
>>> <ola.fosheim.grostad+dlang at gmail.com>" wrote:
>>>> On Thursday, 20 November 2014 at 22:47:27 UTC, Walter Bright wrote:
>>>>> On 11/20/2014 1:55 PM, deadalnix wrote:
>>>>>> All of this is beautiful until you try to implement a quicksort
>>>>>> in, haskell.
>>>>
>>>> […]
>>>>
>>>>> Monads!
>>>>
>>>> I think Deadalnix meant that you cannot do in-place quicksort easily
>>>> in Haskell.
>>>
>>> That's correct.
>>>
>>>> Non-mutating quicksort is easy, no need for monads:
>>>>
>>>> quicksort []     = []
>>>> quicksort (p:xs) = (quicksort lesser) ++ [p] ++ (quicksort greater)
>>>>     where
>>>>         lesser  = filter (< p) xs
>>>>         greater = filter (>= p) xs
>>>>
>>>> https://www.haskell.org/haskellwiki/Introduction#Quicksort_in_Haskell
>>>
>>> Except that isn't really quicksort. Monads are the workaround functional
>>> languages use to deal with things that need mutation.
>>
>> As I like to say, this troika has inflicted a lot of damage on both FP
>> and those beginning to learn it:
>>
>> * Linear-space factorial
>> * Doubly exponential Fibonacci
>> * (Non)Quicksort
>>
>> These losers appear with depressing frequency in FP introductory texts.
>>
>>
>> Andrei
>
> Just like the OOP introductory books that still insist in talking about
> Cars and Vehicles, Managers and Employees, Animals and Bees, always
> using inheritance as code reuse.

The first public example found by google (oop introduction) lists a 
class Student as the first example of a class:

http://www.codeproject.com/Articles/22769/Introduction-to-Object-Oriented-Programming-Concep#Object

and IOException inheriting Exception as the first example of inheritance:

http://www.codeproject.com/Articles/22769/Introduction-to-Object-Oriented-Programming-Concep#Inheritance

First example for overriding is Complex.ToString:

http://www.codeproject.com/Articles/22769/Introduction-to-Object-Oriented-Programming-Concep#Overloading

> Barely talking about is-a and has-a, and all the issues about fragile
> base classes.

Even to the extent those old texts have persisted, they are "only" poor 
style. In contrast, the three FP example I mentioned are computationally 
bankrupt. There is really no excuse for teaching them.


Andrei