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Today's Topics:
1. How can I view a digit on the N-th position of 9^(9^9) in
Haskell? (Sergej KAREL)
2. Re: How can I view a digit on the N-th position of 9^(9^9)
in Haskell? (Francesco Ariis)
3. Re: How can I view a digit on the N-th position of 9^(9^9)
in Haskell? (Sergej KAREL)
----------------------------------------------------------------------
Message: 1
Date: Thu, 06 Jun 2019 21:06:00 +0200 (CEST)
From: "Sergej KAREL" <[email protected]>
To: <[email protected]>
Subject: [Haskell-beginners] How can I view a digit on the N-th
position of 9^(9^9) in Haskell?
Message-ID: <55T.EThB.72{hdq8EsVi.1S{[email protected]>
Content-Type: text/plain; charset="utf-8"
Hello,
Im looking for setting up a solver for the determination of digit on N-th
position of the high value number
Best regards
Sergej
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Message: 2
Date: Thu, 6 Jun 2019 22:12:56 +0200
From: Francesco Ariis <[email protected]>
To: [email protected]
Subject: Re: [Haskell-beginners] How can I view a digit on the N-th
position of 9^(9^9) in Haskell?
Message-ID: <[email protected]>
Content-Type: text/plain; charset=utf-8
Hello Sergej,
On Thu, Jun 06, 2019 at 09:06:00PM +0200, Sergej KAREL wrote:
> Hello,
> Im looking for setting up a solver for the determination of digit on N-th
> position of the high value number
The trick is to only take the appropriate reminder instead of the whole
multiplication result. Something like:
λ> myMult x y = rem (x * y) 100
λ> :t +d foldr1
foldr1 :: (a -> a -> a) -> [a] -> a
λ> myPower x y = foldr1 myMult (replicate y x)
λ> myPower 9 9
89
λ> 9^9
387420489
λ> myPower 9 (myPower 9 9)
89
Does this help?
-F
------------------------------
Message: 3
Date: Fri, 07 Jun 2019 06:06:27 +0200 (CEST)
From: "Sergej KAREL" <[email protected]>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Subject: Re: [Haskell-beginners] How can I view a digit on the N-th
position of 9^(9^9) in Haskell?
Message-ID: <ZqG.EThQ.2hrfaW{DLFy.1S{[email protected]>
Content-Type: text/plain; charset="utf-8"
Hello Francesco,
Im total beginner. I read some books and online pages.
I do not know, how to apply your rows if Im looking eg. digit on position
177486336 of the number string
Sorry for asking so straightforward
Sergej
---------- Původní e-mail ----------
Od: Francesco Ariis <[email protected]>
Komu: [email protected]
Datum: 6. 6. 2019 22:13:36
Předmět: Re: [Haskell-beginners] How can I view a digit on the N-th position
of 9^(9^9) in Haskell?
"Hello Sergej,
On Thu, Jun 06, 2019 at 09:06:00PM +0200, Sergej KAREL wrote:
> Hello,
> Im looking for setting up a solver for the determination of digit on N-th
> position of the high value number
The trick is to only take the appropriate reminder instead of the whole
multiplication result. Something like:
λ> myMult x y = rem (x * y) 100
λ> :t +d foldr1
foldr1 :: (a -> a -> a) -> [a] -> a
λ> myPower x y = foldr1 myMult (replicate y x)
λ> myPower 9 9
89
λ> 9^9
387420489
λ> myPower 9 (myPower 9 9)
89
Does this help?
-F
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