Trustworthiness
It provides the means of constructing systems that can be reasoned
about, in which the risks of mistakes can be assessed, in which
concurrency can be exploited without compromising those properties.
I once sat on a plane with a guy who ran a company that made software
to move money around markets, he was really pleased that they could
handle up to 60 transactions a second. They would take a money moment
(say $5B) split it into 'maximum risk units' and engage in the
conversion between the two currencies. Given the nature of the
distributed transaction, the way in which the commitment process
operated what was *really* important was managing the overall risk of
currency fluctuation in the partially completed distributed
transactions. His typical employee at the time (this was about 8-10
years ago) was a good PhD in quantum chromodynamics - they had the
ability to think about the 'all possible futures' that the code had to
handle. (yes I did my FP evangelisation bit)
That company, with today's Haskell, could start from a simple,
obviously correct, description of the issues and evolve a solution -
knowing that, with equational reasoning, referential transparency and
other properties, the transformations were 'safe'. Doesn't mean you
don't test - does mean you can do more with your good staff.
I've used some of the techniques that are in the haskell libraries
(esp. iteratee's and dsl's) in developing s/w for intrustion detection
companies in the past - granted they were not actually running GHC
code - but specialised C coming out of a DSL
Neil
On 25 Mar 2011, at 07:08, Vasili I. Galchin wrote:
Hello,
I am very curious about the readiness of trading and banking
industries to adopt FPLs like Haskell: http://talenteze.catsone.com/careers/index.php?m=portal&a=details&jobOrderID=466095
.... I currently work in the computer security(intrusion
detection). My colleagues are totally ignorant concerning the
foundations/motivations of FPLs. (Ironically http://www.galois.com
participates in the computer security arena!). Why are are trading/
banking diving into FPLs?
Regards,
Vasili
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