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siniylev [52]
3 years ago
15

Write a Java method onlyDigits that takes a string as a parameter. The method should remove from the string all characters, whic

h are not digits, and return a string that contains only digits.
Computers and Technology
1 answer:
Stels [109]3 years ago
3 0

Answer:

public static String onlyDigits(String in){

    String digitsOnly = in.replaceAll("[^0-9]", "");

    return digitsOnly;

}

A Complete program is wrtten in the explanation section

Explanation:

public class TestClass {

   public static void main(String[] args) {

     String a = "-jaskdh2367sd.27askjdfh23";

       System.out.println(onlyDigits(a));

}

public static String onlyDigits(String in){

    String digitsOnly = in.replaceAll("[^0-9]", "");

    return digitsOnly;

}

}

The output: 23672723

The main logic here is using the Java replaceAll method which returns a string after replacing all the sequence of characters that match its argument, regex with an empty string

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The meaning of mesh topology​ is that it is a type of networking that is made up of the fact that all its nodes do work together to share data amongst each other.

<h3>What is meant by mesh topology?</h3>

Mesh topology is a kind of networking that is said to be where the full nodes do act in a form of a cooperation  so that they can be able to share or distribute data among themselves.

Note that this topology was said to be first seen or developed in about an approximate of about 30+ years ago and it is one that is often used in military applications and now it is seen to be used in home automation, smart HVAC control, and others.

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6 0
2 years ago
Task 1 – File Input
e-lub [12.9K]

Answer:

Check the explanation

Explanation:

using System;

using System.IO;

                 

public class Program

{

 

  public static void Main()

  {

      string[] lines;

      Console.WriteLine("enter name of the file");

      String fileName=Console.ReadLine();

     

      Console.WriteLine("enter path of the file");

      String filePath=Console.ReadLine();

     

      using (StreamReader streamReader = File.OpenText(filePath))

      {

          String text = streamReader.ReadToEnd();

          lines = File.ReadAllLines(filePath);

      }

      Console.WriteLine("Enter path of the file to write");

      String outputFilePath = Console.ReadLine();

      bool fileExist = File.Exists(outputFilePath);

      if (fileExist)

      {      

                  overWriteOrChangeFileName(outputFilePath);          

      }

      else

      {

          File.Create(outputFilePath);

          File.WriteAllLines(outputFilePath, lines);

      }

      Console.Write("Input file Path"+filePath);

      Console.Write("output file path"+outputFilePath);

     

      void overWriteOrChangeFileName(String filePathtoCheck){

          Console.WriteLine("File exists. Do you want to overwrite the file or do you want to change the location and file name of the new file.Press Y to overwrite and press C to change the location and filename");

          String userInput=Console.ReadLine();

          if(userInput.Equals("Y")){

File.WriteAllLines(outputFilePath, lines);

          }else{

              Console.WriteLine("enter new path of the file including filename");

              String NewFileName=Console.ReadLine();

              outputFilePath=NewFileName;

              if(File.Exists(outputFilePath)){

                  overWriteOrChangeFileName(outputFilePath);                  

              }

              else

      {

          File.Create(outputFilePath);

          File.WriteAllLines(outputFilePath, lines);

      }

          }

      }

  }

 

}

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Answer: When companies charge different

prices for the same product, they're using

B.) Dynamic Pricing

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Explanation: If a firm can find a way to charge every customer the price he/she values a good at, the firm can capture more profits than it could with a single price, in a given market.

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