[Haskell-beginners] Left vs Right

[emacstheviking]

Yeah. Learning Lisp did it for me....Haskell is super-strength Kiil-Aid
baby! Drink it and be changed forever.


On 16 April 2015 at 22:22, Greg Graham <greg at grahamtx.net> wrote:

> On Thu, Apr 16, 2015 at 3:42 AM emacstheviking <objitsu at gmail.com> wrote:
>
>> "Semantically, "Either left right" can be seen as a container of one or
>> zero "right" that contains out-of-band information of type "left" when it's
>> empty. So when you fmap over it, you only touch the content, not the
>> out-of-band information."
>>
>> Yup. Whatever he said. ;)  ...that's bordering on monadic comparison
>> tutorials if you ask me... LOL. A lot of people may not even know what "in
>> band" and "out-of-band" even means. I grew up with X25, RS232, HDLC etc so
>> that's ok by me. You have to be very very careful about how you explain
>> things to  people. One of my favourite videos on YouTube is some guy asking
>> Richard Feynman how magnets work...well, he did ask!
>> https://www.youtube.com/watch?v=wMFPe-DwULM
>>
>
> I am just learning Haskell, having just finished working through _Learn
> You a Haskell_, so I am no expert. However, the learning curve I am
> experience reminds me of when I went from Applesoft BASIC to Pascal, and
> when I went from C to C++. There was a lot of new terminology to learn such
> as single-entry/single exit, procedures, formal and actual parameters,
> encapsulation, polymorphism, early and late binding, and overloading.There
> were plenty of nay-sayers that claimed that these paradigms introduced
> unnecessary difficulties, but today you have to search far and wide for
> someone who advocates GOTOs, and although O-O is not universally loved, it
> is easily the dominant paradigm.
>
> So, although I am still finding Haskell to be awkward for me, I am able to
> wrestle with it until it clicks into place, and then it's really beautiful.
> I feel like the benefits of the language will outweigh the effort it is
> taking me to learn it.
>
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