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using list comprehension

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  using list comprehension pip7kids@gmail.com - 2015-07-24 02:06 -0700
    Re: using list comprehension Mark Carroll <mtbc@bcs.org> - 2015-07-24 10:58 +0100
    Re: using list comprehension pip7kids@gmail.com - 2015-07-24 03:45 -0700

#334 — using list comprehension

Hi
I'm trying to understand if I can use the following code in a list comprehension.

The following works for 2 values - 456.78 44
perc = 44.56
returns nav shares =
  let aum = nav * shares
      rets = aum ^ 2
      val = 1000 / perc
      rem = aum / rets  + val 
  in aum / rets * rem ^ 4

main = do 
   print(returns 456.78 44) -- result is 12.620116562240828

.......... however, what I would like to achieve is - can I use the above logic for many values in a list comprehension?

eg

nav = [1,2,3,4]
shares = [5,6,7,8]

I would now like my "return" function to act on the list's nav and shares.
Is this possible and how.

Regards

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#335

pip7kids@gmail.com writes:
(snip)
> The following works for 2 values - 456.78 44
> perc = 44.56
> returns nav shares =
(snip)
> .......... however, what I would like to achieve is - can I use the above logic for many values in a list comprehension?
>
> eg
>
> nav = [1,2,3,4]
> shares = [5,6,7,8]
>
> I would now like my "return" function to act on the list's nav and shares.
> Is this possible and how.

Would "zipWith returns nav shares" do what you want?

--Mark

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#336

On Friday, 24 July 2015 10:06:56 UTC+1, pip7...@gmail.com  wrote:
> Hi
> I'm trying to understand if I can use the following code in a list comprehension.
> 
> The following works for 2 values - 456.78 44
> perc = 44.56
> returns nav shares =
>   let aum = nav * shares
>       rets = aum ^ 2
>       val = 1000 / perc
>       rem = aum / rets  + val 
>   in aum / rets * rem ^ 4
> 
> main = do 
>    print(returns 456.78 44) -- result is 12.620116562240828
> 
> .......... however, what I would like to achieve is - can I use the above logic for many values in a list comprehension?
> 
> eg
> 
> nav = [1,2,3,4]
> shares = [5,6,7,8]
> 
> I would now like my "return" function to act on the list's nav and shares.
> Is this possible and how.
> 
> Regards

Thats simply brilliant - thanks

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