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Most performance optimal foreach function with getting index


Most performance optimal foreach function with getting index

By : Xuanxuan Gan
Date : November 22 2020, 02:59 PM
I wish this help you Like ShanShan said in the comment, the index is the second parameter of the anonymous function being passed to forEach. The code would look like this.
code :
spacecrafts.forEach(function(spacecraft, index) { 
  console.log(index,spacecraft);
});


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PostgreSQL: How to structure and index time-related data for optimal query performance?

PostgreSQL: How to structure and index time-related data for optimal query performance?


By : Arfa Yasser
Date : March 29 2020, 07:55 AM
Optimal render draw-order function with specified z-index values

Optimal render draw-order function with specified z-index values


By : cotacon
Date : March 29 2020, 07:55 AM
Any of those help First of all do never copy a list if not needed. The list with renderables could be really huge since it also could contain resources. Copying will be very very slow. If you need something local and you need performance try to make it final since it can improve the performance.
So a simple approach would be the default sorting of Java. You need to implement a Comperator for your class for example the Class with z index could look like this:
code :
public class MyRenderable {
    private float z_index;
    public MyRenderable(float i)
    {
        z_index = i;
    }

    public float getZ_index() {
        return z_index;
    }

    public void setZ_index(float z_index) {
        this.z_index = z_index;
    }
}
private void sortList(ArrayList<MyRenderable> array) {
    // double starttime = System.nanoTime();
    for (int i = 1; i < array.size(); i++) {
        final MyRenderable temp = array.get(i);
        int j = i - 1;

        while (j >= 0 && array.get(j).getZ_index() < temp.getZ_index()) {
            array.set(j + 1, array.get(j));
            j--;
        }
        array.set(j + 1, temp);
    }
    // System.out.println("Time taken: " + (System.nanoTime() - starttime));
}
sortList(renderbales);
public class Group{
//think about privates and getters or methods to add things which also checks some conditions and so on
    public int groupType; 
    public ArrayList<MyRenderable> renderables;
}
ArrayList<Group> allRenderables = new ArrayList<>();
    for(Group g: allRenderables)
        sortRenderables(g.renderables); //now every group is sorted
    //now sort by group names
    sortGroup(allRenderables);
public static void sortRenderables(ArrayList<MyRenderable> array) {
    for (int i = 1; i < array.size(); i++) {
        final MyRenderable temp = array.get(i);
        int j = i - 1;

        while (j >= 0 && array.get(j).getZ_index() < temp.getZ_index()) {
            array.set(j + 1, array.get(j));
            j--;
        }
        array.set(j + 1, temp);
    }
}

public static void sortGroup(ArrayList<Group> array) {
    for (int i = 1; i < array.size(); i++) {
        final Group temp = array.get(i);
        int j = i - 1;

        while (j >= 0 && array.get(j).groupType < temp.groupType) {
            array.set(j + 1, array.get(j));
            j--;
        }
        array.set(j + 1, temp);
    }
}
JSTL forEach loop optimal way of next index value

JSTL forEach loop optimal way of next index value


By : Pat Ryan
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Change the inner c:forEach and c:out as shown below that should give your result
code :
<c:forEach var="k" items="${subsplit}" varStatus="status">
<c:if test = "${k == 'de_f'}">
<c:out value="${subsplit[status.index+1]}" /> <!-- This Should print "AE" -->
</c:if>
</c:forEach>
Optimal implementation of function in terms of performance

Optimal implementation of function in terms of performance


By : Ves
Date : March 29 2020, 07:55 AM
it helps some times I have a list of items and a map that is stores the information about the product and it's items data. There are around 150k items in the DB and around 200k products (each product has approximately 1000 to 2000 items that mapped to it). , You have two ways :
Should I define my Cython function using def, cdef, or cpdef for optimal performance?

Should I define my Cython function using def, cdef, or cpdef for optimal performance?


By : Sudhanshu Pradhan
Date : March 29 2020, 07:55 AM
hop of those help? If you want optimal performance, you should know that as mentioned in this answer to a related question:
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