How to compare two files in Windows

Start-> cmd

on the commandline just write

FC file1 file2

Note that file1 and file2 stand for the full path to the files. Example:

FC C:\Users\Desktop\DB.docx C:\Users\Desktop\DB2.docx

It works just like Diff in Linux

How to backup automatically a file to a network

Just create a batch file with the following command:

robocopy source destination /xo /purge /e

Example for source would be: C:\desktop\myfolder
Example for destination would be: T:\backup\myfolder

The files deleted in the source will be deleted in the destination and just the files changed will be copied to the destination (high performance).

/E : Copy Subfolders, including Empty Subfolders.
/XO : eXclude Older - if destination file exists and is the same date or newer than the source - don't bother to overwrite it.
/PURGE :: delete dest files/dirs that no longer exist in source.

How to add a string at the beginning of each line

On Notepad++

• Move your cursor to the start of the first line
• Hold down Alt + Shift and use the cursor down key to extend the selection to the end of the block
• Write your string and it will be written simultaneous at the beginning of each line.
  

How to get a macro to run when a cell/cells is/are changed on any worksheet of a specific workbook

Just write the following code on your "VBA Project" -> "This Workbook":

Private Sub Workbook_SheetChange(ByVal sh As Object, ByVal target As Range)

Dim KeyCells As Range

Set sh = ActiveSheet

    Set KeyCells = sh.Range("B20:e25")  ''''change the range to your range
   
    If Not Application.Intersect(KeyCells, sh.Range(target.Address)) _
           Is Nothing Then
         

                '''''''''''please write your code here'''''''''''''

    End If
   
  
End Sub

Primitive variables in Java

 If you want to copy the code, it is written below.

public class Application {
    public static void main(String[] args) {
      
            int myNumber=88;
            short myShort= 867;
            long myLong= 9797;
           
            double myDouble= 7.3243;
            float myFloat= 324.3f;
           
            char myChar = 'y';
            boolean myBoolean = true;
           
            byte myByte=127;
           
            System.out.println(myNumber);
            System.out.println(myShort);
            System.out.println(myLong);
            System.out.println(myDouble);
            System.out.println(myFloat);
            System.out.println(myChar);
            System.out.println(myBoolean);
            System.out.println(myByte);
}

}

Hello World in Java

public class Application {

    public static void main(String[] args) {
        System.out.println("Hello World!");
     }

}

How to write in Python online?

Do you want to run a python code without having to download the program and install it?  It is pretty easy, just go to the next link , write the code and run it. The output will appear on the right window:

http://www.codeskulptor.org/