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Catamorphism that allows looking at part of the final result


By : Zoe Williams
Date : October 17 2020, 06:10 AM
Hope this helps Though this is not necessarily what you were looking for, we can encode the laziness trick with a hylomorphism:
code :
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE TupleSections #-}
{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE DeriveFoldable #-}
{-# LANGUAGE DeriveTraversable #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TemplateHaskell #-}

import Data.Functor.Foldable
import Data.Functor.Foldable.TH

data CappedList c a = Cap c | CCons a (CappedList c a)
    deriving (Eq, Show, Ord, Functor, Foldable, Traversable)
makeBaseFunctor ''CappedList

-- The seq here has no counterpart in the implementation in the question.
-- It improves performance quite noticeably. Other seqs might be added for
-- some of the other "s", as well as for the percentage; the returns, however,
-- are diminishing.
toPercents :: Floating a => [a] -> [a]
toPercents = snd . hylo percAlg sumCal . (0,)
    where
    sumCal = \case
        (s, []) -> CapF s
        (s, a : as) -> s `seq` CConsF a (s + a, as)
    percAlg = \case
        CapF s -> (s, [])
        CConsF a (s, as) -> (s, (a * 100 / s) : as)


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My final result doesn't match the intended result for a while loop


By : Edo_P
Date : March 29 2020, 07:55 AM
it helps some times Several answers have pointed out that the even test exits the first time. The problem is that that two tests are not related. You want to exit when you've reached your limit. And you want to add when it's even. Separate the two tests
code :
import java.util.Scanner;

public class CHP4Ex
{
     public static void main(String[] args)
     {
          Scanner scan = new Scanner(System.in);
          System.out.println("enter a n: ");
          int n = scan.nextInt();
          int i=0;
          int sum=0;
          while (i<=n)
          {
              if (i%2 == 0)
              {
                  sum = sum + i;
              }
              i++;
          }
          System.out.println(sum);
     }
}

why scalaz semigroup |+| for either type not take the left result as final result but for operation do


By : Dan Levine
Date : March 29 2020, 07:55 AM
this will help This is the code from scalaz document, so basically, if the value is left value, it will take this left value as the final result and stop evaluating the rest, which is very useful. , You can use traverse syntax
code :
val result = (1 to 6).toList.traverseU(processor.evaluate)

Rename final part of a directory following final forwardslash


By : user3756186
Date : March 29 2020, 07:55 AM
I wish this help you I wrote a small script that will do the job for you.
It will read the content of an input file, remove everything after last slash + slash sign, and append /rs at the end, and then write the changes to a new file (called output.txt).
code :
#!/bin/bash
# Usage: ./script.sh input.txt, where input.txt is your input file with the
# raw data you want to change.

while IFS='' read -r line
do
    name=$line
    echo "Before: $name"
    name=`echo $name | awk -F '/'  '{ for(i=1; i<=8; i++) {print $i} }' | tr '\n' '/'|sed 's/.$//'`
    echo "$name/rs" >> output.txt
done < "$1"

# EOF

Merge multiple result tables and perform final query on result


By : MAGHAM VINOD
Date : March 29 2020, 07:55 AM
wish helps you Both functions simplified and merged, also supplying value parameters in the USING clause:
code :
CREATE OR REPLACE FUNCTION pg_temp.func_accu(_location_id integer, schema_customer text)
  RETURNS TABLE(networkid integer, count bigint) AS
$func$
BEGIN
   RETURN QUERY EXECUTE format('
      SELECT f.networkid, max(f.ct)
      FROM   %I.gateway g
           , get_available_networks_gw(g.id, $1) f(networkid, ct)
      WHERE  g.location_id = $2
      GROUP  BY 1'
    , _schema_customer)
   USING  _schema_customer, _location_id;
END
$func$ LANGUAGE plpgsql;
SELECT * FROM func_accu(123, 'my_schema');
SELECT f.networkid, max(f.ct)
FROM   myschema.gateway g, get_available_networks_gw(g.id, 'my_schema') f(networkid, ct)
WHERE  g.location_id = $2
GROUP  BY 1;

Wildfly 8.1.0 Final + Arquillian 1.1.5.Final = ArquillianServletRunner - No result returned


By : Muhammed Rahmoon
Date : March 29 2020, 07:55 AM
Hope this helps I would suggest you to use Arquillian BOM to manage your dependencies. I have executed your Arquillian test using the below configuration and worked both for managed and remote WildFly.
You can find the code in this arquillian-wildfly-example GitHub repo for your convenience. Make sure to activate the remote WidlFly profile (managed is active by default) inside POM xml and also make the wildfly-remote container configuration as default (default="true") in arquillian.xml. In addition remove the default="true" from wildfly-managed container configuration inside arquillian.xml
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