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How to make my loops more generic?


How to make my loops more generic?

By : user2949266
Date : November 16 2020, 06:23 AM
wish help you to fix your issue Below is my code. As you will see there is 2 almost identical blocks of code. The only thing that is different is the type of the object. I am looking for a way to make it more generic. To have one block of code and just set the type (Owner, Car) as a param in my method. Any hint? I've tried using reflection but I never was able to make it dynamic cause I had to loop over the collection , You should be able to collapse your entire code block down to:
code :
 Class clazz = queryResult.get(0).getClass();
 classFields = clazz.getDeclaredFields();
 data = new Object[queryResult.size()][classFields.length];
 for(Object result : queryResult) {
     int rCounter = 0;
     for(Field field : clazzFields) {
         field.setAccessible(true);
          try {
              data[lCounter][rCounter] = field.get(result);
          } catch (IllegalArgumentException e1) {
               e1.printStackTrace();
          } catch (IllegalAccessException e1) {
               e1.printStackTrace();
          }
          rCounter++;
      }
      lCounter++;
}


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generic class inherited from NameObjectCollectionBase - make type safe 'for each' loops

generic class inherited from NameObjectCollectionBase - make type safe 'for each' loops


By : antymat
Date : March 29 2020, 07:55 AM
wish helps you my class - Class GenericNameValueCollection(Of valueT) inherits from NameObjectCollectionBase, but when I iterate a collection of this class it lets me use any object in the for each loop , I want it to check the type of object and make sure that the object is the same type as the collection, but the NameObjectCollectionBase GetEnumerator function is allowing any object type.I also tried adding Implements IEnumerator(Of valueT) to my class but it is still getting the enumerator from the base class. , Implement IEnumerable instead, as that is what its looking for
How to split your foreach that will make 1000 loops and echo the output on every 50 loops?

How to split your foreach that will make 1000 loops and echo the output on every 50 loops?


By : Somnath
Date : March 29 2020, 07:55 AM
wish of those help DhruvPathak's solution kind of works, but the correct answer would be something like
code :
$freq = 50;
for($i = 0 ;$i < 1000 ;$i++)
{
   /* some work here */

    if($i % $freq  == ($freq-1))
      echo  "my message \n";
}
if($i % $freq  != ($freq-1))
   echo  "last echo \n";
Casting Generic types in loops Java 7

Casting Generic types in loops Java 7


By : dden
Date : March 29 2020, 07:55 AM
wish helps you I have two different types of Sets that need to be iterated and one of the values of the objects of the set need to be summed. How can I do this with Generics, i.e without writing two summing methods for each type of Set? , Define a common interface, say Scorable:
code :
public interface Scorable {
  int getScore();
}
public class Foo implements Scorable {
  public int getScore () { return 1; }
}

public class Bar implements Scorable {
  public int getScore () { return 2; }    
}
private static Double calculateScoreSum(Set<? extends Scorable> scoreSet) {
    Double sum = 0.0;
    for (Scorable score : scoreSet){
        sum += score.getScore();
    }
    return sum;
}
Make return a generic object without having to make class generic

Make return a generic object without having to make class generic


By : Station Weather
Date : March 29 2020, 07:55 AM
This might help you I have a class which should return a generic ArrayList, so it would be: , It sounds like you want to make the method generic, like this:
code :
public <T> List<T> getAsList(String key){
    return (List<T>)genericObjects.get(key);
}
MyClass myClass = new MyClass();
List<String> strings = myClass.<String>getAsList("strings");
List<Integer> integers = myClass.<Integer>getAsList("integers");
Loops inside of loops/Replace can't make them work

Loops inside of loops/Replace can't make them work


By : devilpeng1982
Date : March 29 2020, 07:55 AM
I wish this helpful for you Method String.ReplaceAll receives regex as first argument. It allows you to remove all vowels in one shot:
code :
    public class AnotherExercise {

    public static void main (String[] args){

        String[] intruments = {"cello", "guitar", "violin", "double bass"};
        String[] intruments2 = new String[5];
        String nothing = "";

        for (int i = 0; i < 4; i++){

            intruments2[i] = intruments[i].replaceAll("a|e|i|o|u", nothing);

            System.out.println(intruments2[i]);
        }

    }

}
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