Talk:Sum and product puzzle

Remove draft status?

Now that I improved the task description, is this task ready for prime time? --Smls (talk) 14:47, 5 August 2016 (UTC)

I went ahead and took it out of draft status. --Smls (talk) 12:35, 20 August 2016 (UTC)

Scala

Could someone in the know please explain these two lines in plain English?

val step2 = step0 filter { sumEq(_) forall { prodEq(_).size != 1 }}

  step2 contains the pairs whose product is unique and ??
 

val step3 = step2 filter { prodEq(_).intersect(step2).size == 1 }

step2 filters the step0 integer pairs for pairs where "For every possible sum decomposition of the number X+Y, the product has in turn more than one product decomposition"

step3 filters the set defined by step2 for pairs where "The number X*Y has only one product decomposition for which fact 1 is true"

Perhaps the Haskell or JavaScript versions might seem more legible ? Hout (talk) 17:35, 21 October 2016 (UTC)

Still not explicit enough :-( Sorry Meanwhile I added 2 translations where I could understand the source (AWK and GO/ --Walterpachl (talk) 18:54, 26 October 2016 (UTC)

Do higher order functions feature in the architecture or traditions of REXX ? If not, the patterns of functional composition used in the Haskell and Scala etc examples may be a little hard to translate all that directly. Hout (talk) 19:18, 3 November 2016 (UTC)