Assigning the variable as '\ r' instead of taking the value received from the user?

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• Convert CSV file data from any language to English in C#

  I would like to convert CSV file data from multi languages such as Spanish, Russian, European etc to English language in C# program.

  Convert all characters like Ó, É to English characters.

  Thanks.
• I get an error when solving this problem, How can I fix?

  I am trying to solve the Climbstairs problem but in reverse, where I want to know the number of steps I have to take to go down.

  I can go down 1, 2, 3 or 4 steps at the same time. That is, if I am at step i, I can go down to step i - a for any of the values 1, 2, 3 or 4 of a.

  I have the following code but I don't know what happens:

  I got this error: System.IndexOutOfRangeException in this line: steps[i] += steps[i - a];

  Why I have this error?

          public static int DownStairs(int n)
          {
              int[] steps = new int[n + 1];
  
              steps[n] = 1;
              steps[n - 1] = 1;
  
              for (int i = n-2; i>=0; i--)
              {
                  for(int a = 1; a<=4; a++)
                  {
                      steps[i] += steps[i - a];
                  }
                  
              }
  
              return steps[n];
          }
  
          static void Main(string[] args)
          {
              int n = 5;
              DownStairs(n);
             
              
          }
  
• How to delete multiple blank lines in a WPF DataGrid imported from an Excel file

  I have a WPF DataGrid which I fill with imported data from an Excel file (*. Xlsx) through a class, the problem is that multiple blank lines are added to the end of the DataGrid that I don't see how to delete. I attach my code.

  <DataGrid Name="dgvMuros" Height="210" Margin="8" VerticalAlignment="Top" Padding="5,6" ColumnWidth="50" IsReadOnly="False" 
                                AlternatingRowBackground="Azure" GridLinesVisibility="All"  HeadersVisibility="Column" 
                                Loaded="dgvMuros_Loaded" CellEditEnding="DataGrid_CellEditEnding" ItemsSource="{Binding Data}" 
                                HorizontalGridLinesBrush="LightGray" VerticalGridLinesBrush="LightGray" >
                      </DataGrid>
  

  With this method I import the data from the Excel file.

  public void ImportarMuros()
      {
          ExcelData dataFronExcel = new ExcelData();
          this.dgvMuros.DataContext = dataFronExcel;
          txtTotMuros.Text = dataFronExcel.numMuros.ToString();
  
          cmdAgregarMuros.IsEnabled = false;
          cmdBorrarMuros.IsEnabled = false;
          cmdImportar.IsEnabled = false;
      }
  
  
  
  public class ExcelData
  {
      public int numMuros { get; set; }
      public DataView Data
      {
          get
          {
              Excel.Application excelApp = new Excel.Application();
              Excel.Workbook workbook;
              Excel.Worksheet worksheet;
              Excel.Range range;
              workbook = excelApp.Workbooks.Open(Environment.CurrentDirectory + "\\MurosEjemplo.xlsx");
              worksheet = (Excel.Worksheet)workbook.Sheets["DatMuros"];
  
              int column = 0;
              int row = 0;
  
              range = worksheet.UsedRange;
              DataTable dt = new DataTable();
              dt.Columns.Add("Muro");
              dt.Columns.Add("Long");
              dt.Columns.Add("Esp");
              dt.Columns.Add("X(m)");
              dt.Columns.Add("Y(m)");
              dt.Columns.Add("Dir");
              for (row = 2; row < range.Rows.Count; row++)
              {
                  DataRow dr = dt.NewRow();
                  for (column = 1; column <= range.Columns.Count; column++)
                  {
                      dr[column - 1] = Convert.ToString((range.Cells[row, column] as Excel.Range).Value);
                  }
                  dt.Rows.Add(dr);
                  dt.AcceptChanges();
                  numMuros = dt.Rows.Count;
              }
              workbook.Close(true, Missing.Value, Missing.Value);
              excelApp.Quit();
              return dt.DefaultView;
          }
      }
  }
  
• bash functions, local variables, and exit codes

  In a bash function, I'm trying to capture the output of a command along with it's exit code. Generally, my form is

  some_function() {
  local rv=$(some_other_function)
  local code=$?
  echo "$rv"
  return $code
  }
  

  but I notice that whenever I use 'local', then $? is ALWAYS 0. Like it's capturing the result of the assignment, not the called function. If I don't use 'local', then it works as expected:

  $ foo() { local rv=$(false); echo "code is $?"; }
  $ foo
  code is 0
  $ foo() { rv=$(false); echo "code is $?"; }
  $ foo
  code is 1
  

  Can someone explain this to me? Obviously something fundamental here I just don't understand.
• How do I set the src value of an iFrame to the text in an input field?

  How would I be able to change the site in an iFrame to the value in an input field.

  I want to do something like this:

  iframe {
    height: 320px;
    width: calc(100vw - 24px);
    resize: both;
    overflow: auto;
  }

  <input type="text"/>
  <button type="submit">🔎</button><br>
  <iframe src="https://xijxaj.glitch.me/new/index.html">
• I keep getting a "variable declaration not allowed here" error

  I keep getting a "variable declaration not allowed here" error. I am trying to input a menu selection to run queries that I have embedded in methods for a JDBC program.

  import java.sql.Connection;
  import java.sql.DriverManager;
  import java.sql.ResultSet;
  import java.sql.Statement;
  import java.sql.SQLException;
  import java.sql.*;
  import java.util.Scanner;
  /**
   *
   */
  public class pbr {
      public static void main(String[] args)
      {   if (args.length != 5) {
          System.out.println("USAGE: ser322.pbr <url> <user> <passwd> <driver> <menu>");
          System.exit(0);
      }
          if (args[4].equals("menu"))
              Scanner scanner = new Scanner(System.in);
              System.out.println(("\n Choose from the following menu") + ("\nquery 1")+ ("\nquery 2"));
              String menuSelection = scanner.next();
              if (menuSelection.equals("query1"))
                  query1(args);
              if (menuSelection.equals("query2"))
                  query2(args);
          else
              System.out.println("menu is the only accepted parameter");