Categories
Mastering Development

How do I Ignore XML Comments Using a JAXP SAX Parser?

I have a large XML file containing many key value pairs. The file contains both multi-line comments and actual data. Within the comments section, there are examples of how the data/key-value pairs should be arranged. The SAX parser that I have made successfully retrieves the keys and values from the file, but it also reads […]

Categories
Mastering Development

Longest Increasing and Decreasing subsequence

Question – Given an array of integers, A of length N, find the length of longest subsequence which is first increasing then decreasing. Input:[1, 11, 2, 10, 4, 5, 2, 1] Output: 6 Explanation:[1 2 10 4 2 1] is the longest subsequence. I wrote a top-down approach. I have five arguments – vector A(containing […]

Categories
Development

why quick sort implemented in rcpp works slow?

I have implemented quick sort algorithm in Rcpp, but it works significantly slower than sort(array, method=”quick”) for large arrays. Why? Here is my Rcpp code // partition using hoare’s scheme #include <Rcpp.h> using namespace Rcpp; int partition(NumericVector a,int start,int end) { double pivot = a[end]; int i = start – 1; int j = end […]

Categories
Development

How to properly memoize Marshal.ReadByte on a 1 bit per pixel bitmap

I am trying to improve a 1bpp image search function I have put together. I Referenced Bob Powell’s excellent page, and some of the answers here and I was able to put together this routine that works pretty well. void PrintScreen() { keybd_event(VKey.VK_SNAPSHOT, 0, KEYEVENTF_EXTENDEDKEY, 0); keybd_event(VKey.VK_SNAPSHOT, 0, KEYEVENTF_KEYUP, 0); } Bitmap PrintWindow() { PrintScreen(); […]

Categories
Development

How to filter a ListView that has a list of values retrieved from Firebase database

I have already retrieved data from Firebase database in a ListView. It has two Textviews 1) Student Name 2)Class of student. Now I want to filter this ListView with Edit_Text and also have onClickListener with ListView but I am unable to do it.When I type something in the Edit_Text the whole list becomes empty..Here is […]

Categories
Development

move MainActivity to HomeFragment

I am creating a Dictionary. But created in Main Activity. and i want to move MainActivity event to HomeFragment. How can i move these activity from MainActivity to HomeFragment? I tried to move by create new class HomeFragment2 in HomeFragment.java but List doesn’t appear and I have this error. E/RecyclerView: No adapter attached; skipping layout […]

Categories
Development

(urgent)Builder not changed in aftertextchanged for edittext in fragment

How can I change my edittext after changed? Method works but edittext not change. Can I use setview in aftertextchanged? Alertdialog in fragment so it is difficult and I used this app crashed AlertDialog.Builder builder = new AlertDialog.Builder(this.getContext()); builder.setTitle(“Lütfen tutar girin”); final EditText input = new EditText(this.getContext()); input.setInputType(InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_DECIMAL); builder.setView(input); input.addTextChangedListener(new TextWatcher() { @Override […]

Categories
Development

How to search data in recylerview in android

All my code is running successful but I Want to add Searchview. I tried many method. When edittext text change app crashed. I also applied try cathed method but i am not seeing any error Just app crashed and go to main activty. Here is my listadapter class code. public class MyListAdapter extends RecyclerView.Adapter<MyListAdapter.ViewHolder> implements […]

Categories
Development

How to search data in recylerview in android

All my code is running successful but I Want to add Searchview. I tried many method. When edittext text change app crashed. I also applied try cathed method but i am not seeing any error Just app crashed and go to main activty. Here is my listadapter class code. public class MyListAdapter extends RecyclerView.Adapter<MyListAdapter.ViewHolder> implements […]

Categories
Development

Writing a Java QuickSort function with only 1 Array

I’m a CS student and for an assignment, my professor is allowing us to use code from QuickSort programs online and sync it up with a sort file in our project. I have the following complete: public class QuickSort extends SortAlgorithm { @Override public String getName() { return “Quick Sort”; } @Override public void sort(int[] […]