CodeBind.com - Page 4 of 21 - Free Programming Tutorials and Lessons By ProgrammingKnowledge

Scala String Example

February 8, 2018 admin 0

// Scala - String 
object Demo {
  val num1 = 75;
  val num2 = 100.25;
  val str1 : String = "Hello World";
  val str2 : String = " Max";
  def main(args: Array[String]) {
    println(str1.length());  
    println(str1.concat(str2));
    println(str1 + str2);
    
    val result = printf("(%d -- %f -- %s)", num1, num2, str1);
    println(result);
    println("(%d -- %f -- %s)".format(num1, num2, str1));
    printf("(%d -- %f -- %s)", num1, num2, str1);
  }
}

/*
OUTPUT:
11
Hello World Max
Hello World Max
(75 -- 100.250000 -- Hello World)()
(75 -- 100.250000 -- Hello World)
(75 -- 100.250000 -- Hello World)
*/

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

// Scala - String

object Demo {

val num1 = 75;

val num2 = 100.25;

val str1 : String = "Hello World";

val str2 : String = " Max";

def main(args: Array[String]) {

println(str1.length());

println(str1.concat(str2));

println(str1 + str2);

val result = printf("(%d -- %f -- %s)", num1, num2, str1);

println(result);

println("(%d -- %f -- %s)".format(num1, num2, str1));

printf("(%d -- %f -- %s)", num1, num2, str1);

}

/*

OUTPUT:

11

Hello World Max

(75 -- 100.250000 -- Hello World)()

(75 -- 100.250000 -- Hello World)

*/

How to install MongoDB on Mac OS X

January 7, 2018 admin 2

In this post we will see How to install MongoDB on Mac OS X. MongoDB is one of the most used, […]

Function Currying in Scala

January 6, 2018 admin 0

Currying is the technique of transforming a function that takes multiple arguments into a function that takes a single argument. […]

Scala – Closures

January 6, 2018 admin 0

A closure is a function which uses one or more variables declared outside this function.

// Scala - Closures
/* codebind.com */
import java.util.Date
object Demo {
  val number = 10;
  val add = (x : Int) =>  {
    x + number;
  }
  
  def main(args: Array[String]) {
    println(add(20));
    println(number)
  }
}

1

2

3

4

5

6

7

8

9

10

11

12

13

14

// Scala - Closures

/* codebind.com */

import java.util.Date

object Demo {

val number = 10;

val add = (x : Int) => {

x + number;

}

def main(args: Array[String]) {

println(add(20));

println(number)

}

How to unzip a zip file using Terminal in Linux (Ubuntu, Linux mint, Debian …)?

January 1, 2018 admin 0

In this post I am going to show you how to unzip the .zip file which you have download from […]

tar Command in Linux / Unix

December 22, 2017 admin 0

tar Command in Linux / Unix tar is an acronym for Tape Archive. tar command is used to Manipulates archives […]

How to Change Hostname in Ubuntu 16.04 (Change Computer Name)

December 19, 2017 admin 0

In this tutorial we will see How to Change Hostname in Ubuntu 16.04. This method will work without the need […]

cat command in Linux / Unix

December 17, 2017 admin 0

cat command in Linux/Unix Linux cat command. cat command is used to show the content of a files and also […]

mkdir command in Linux / Unix

December 17, 2017 admin 0

mkdir command in Linux/Unix Linux mkdir command. mkdir Creates directories with the given names. mkdir creates the DIRECTORY(ies), if they […]

ls command in Linux / Unix

December 17, 2017 admin 0

ls command in Linux/Unix Linux ls command. ls command Lists the files in the current directory, in alphanumeric order, except […]

How to Download Files Using wget and curl

How to Download Files On Linux Using wget command or curl command

December 15, 2017 admin 0

If you want to download files on your Linux or Unix system, wget and curl are your main options. Wget Wget is a free GNU […]

How to Install OpenCV in Ubuntu 16.04 LTS for Python

December 12, 2017 admin 1

In this post we will see How to Install OpenCV in Ubuntu for Python OpenCV is an image processing library […]

How to Enable SSH on Ubuntu 16.04 LTS (Install openssh-server)

December 8, 2017 admin 0

In this post we will see how to enable SSH or Secure Shell service on our Ubuntu 16.04 LTS operating […]

Scala – Functions

November 14, 2017 admin 0

// Functions in Scala
object Demo {

  object Math {
    def add(x: Int, y: Int): Int = {
      return x + y;
    }
    def square(x: Int) = x*x;
  }
  def add(x: Int, y: Int): Int = {
    return x + y;
  }
  def subtract(x: Int, y: Int): Int = {
    x - y;
  }
  def multiply(x: Int, y: Int): Int = x * y;

  def divide(x: Int, y: Int) = x / y;

  def main(args: Array[String]) {
    println(Math.add(45,15));
    println(Math square 3); 
    println(add(45, 15));
    println(subtract(45, 15));
    println(multiply(45, 15));
    println(divide(45, 15));
  }
}


/*
output:
60
9
60
30
675
3

*/

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

// Functions in Scala

object Demo {

object Math {

def add(x: Int, y: Int): Int = {

return x + y;

}

def square(x: Int) = x*x;

}

def add(x: Int, y: Int): Int = {

return x + y;

}

def subtract(x: Int, y: Int): Int = {

x - y;

}

def multiply(x: Int, y: Int): Int = x * y;

def divide(x: Int, y: Int) = x / y;

def main(args: Array[String]) {

println(Math.add(45,15));

println(Math square 3);

println(add(45, 15));

println(subtract(45, 15));

println(multiply(45, 15));

println(divide(45, 15));

}

/*

output:

60

9

60

30

675

3

*/

// Functions in Scala
object Demo {

  object Math {
    def +(x: Int, y: Int): Int = {
      return x + y;
    }
    def **(x: Int) = x*x;
  }
  
  def print(x: Int, y : Int): Unit = {
    println(x+y);
  }

  def main(args: Array[String]) {
    
    var add = (x : Int, y : Int) => x + y;
    println(add(300, 500));
    val sum = 10 * 20;
    print(100, 200);
    println(Math.+(60, 15));
    println(Math ** 3);
  }
}


/*
OUTPUT:
800
300
75
9

*/

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

// Functions in Scala

object Demo {

object Math {

def +(x: Int, y: Int): Int = {

return x + y;

}

def **(x: Int) = x*x;

}

def print(x: Int, y : Int): Unit = {

println(x+y);

}

def main(args: Array[String]) {

var add = (x : Int, y : Int) => x + y;

println(add(300, 500));

val sum = 10 * 20;

print(100, 200);

println(Math.+(60, 15));

println(Math ** 3);

}

/*

OUTPUT:

800

300

75

9

*/

// Scala - Higher-Order Functions
object Demo {

   def math(x: Double, y:Double, z:Double, f: (Double, Double)=>Double): Double = f(f(x, y), z);
  
  def main(args: Array[String]) {
    val result = math(50, 20, 10, _ max _);
    println(result);
  }
}

1

2

3

4

5

6

7

8

9

10

// Scala - Higher-Order Functions

object Demo {

def math(x: Double, y:Double, z:Double, f: (Double, Double)=>Double): Double = f(f(x, y), z);

def main(args: Array[String]) {

val result = math(50, 20, 10, _ max _);

println(result);

}

// Scala - Partially Applied Functions
import java.util.Date
object Demo {

  def log(date : Date, message: String) = {
    println(date + "   " + message);
  }
  
  def main(args: Array[String]) {
    val sum = (a: Int, b: Int, c: Int) => a + b + c    
    val f = sum(10, _: Int, _ : Int)    
    println(f(100, 200));
    
    val date = new Date;
    val newLog = log(date, _ :String);
    newLog("The message 1");
    newLog("The message 2");
    newLog("The message 3");
    newLog("The message 4");
    
    
  }
}


/*
OUTPUT:
310
Fri Dec 15 18:28:45 CET 2017   The message 1
Fri Dec 15 18:28:45 CET 2017   The message 2
Fri Dec 15 18:28:45 CET 2017   The message 3
Fri Dec 15 18:28:45 CET 2017   The message 4


*/

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

// Scala - Partially Applied Functions

import java.util.Date

object Demo {

def log(date : Date, message: String) = {

println(date + " " + message);

}

def main(args: Array[String]) {

val sum = (a: Int, b: Int, c: Int) => a + b + c

val f = sum(10, _: Int, _ : Int)

println(f(100, 200));

val date = new Date;

val newLog = log(date, _ :String);

newLog("The message 1");

newLog("The message 2");

newLog("The message 3");

newLog("The message 4");

}

/*

OUTPUT:

310

Fri Dec 15 18:28:45 CET 2017 The message 1

Fri Dec 15 18:28:45 CET 2017 The message 2

Fri Dec 15 18:28:45 CET 2017 The message 3

Fri Dec 15 18:28:45 CET 2017 The message 4

*/

Scala – Match expressions

November 12, 2017 admin 0

In Scala match expressions are used to select between a list of alternatives same as multiple if-statements or select statement, […]