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// Scala - Options (Some or None) object Demo { val lst = List(1, 2, 3); val map = Map(1 -> "Tom", 2 -> "Max", 3 -> "John"); val opt : Option[Int] = Some(55); def main(args: Array[String]) { println(lst.find(_ > 2).getOrElse(0)); println(map.get(5).getOrElse("No_name_found")); println(opt.isEmpty) println(opt.get) } } /* 3 No_name_found false 55 */ |
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// Scala - Tuples object Demo { val mytuple = (1, 2, "hello", true); val mytuple2 = new Tuple3(1, 2, "hello"); val mytuple3 = new Tuple3(1, "hello", (2,3)); def main(args: Array[String]) { println(mytuple._1); println(mytuple._2); println(mytuple._3); println(mytuple._4); println(mytuple2._3); mytuple.productIterator.foreach{ i => println(i); } println(1 -> "Tom" -> true); println(mytuple3._3._2); } } /* OUTPUT: 1 2 hello true hello 1 2 hello true ((1,Tom),true) 3 */ |
What Is OpenGL? OpenGL is a Graphics rendering API which is operating system independent, window system independent and has high-quality […]
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// Scala - Maps object Demo { val mymap : Map[Int, String] = Map(801 -> "max", 802 -> "Tom", 804 -> "July"); val mymap2 : Map[Int, String] = Map(805 -> "lua"); def main(args: Array[String]) { println(mymap); println(mymap(801)); println(mymap.keys); println(mymap.values); println(mymap.isEmpty); mymap.keys.foreach { key => println("key " + key); println("Value "+ mymap(key)); } println(mymap.contains(801000)); println(mymap ++ mymap2); println(mymap.size); } } /* output: Map(801 -> max, 802 -> Tom, 804 -> July) max Set(801, 802, 804) MapLike.DefaultValuesIterable(max, Tom, July) false key 801 Value max key 802 Value Tom key 804 Value July false Map(801 -> max, 802 -> Tom, 804 -> July, 805 -> lua) 3 */ |
SQLite C/C++ – CREATE Table in SQLite Database using C/C++ SQLite C/C++- CREATE Table in SQLite Database using C/C++ […]
SQLite C/C++- CREATE and OPEN SQLite Database using C/C++ Make a C Program file and Name it as main.c […]
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// Scala - Sets object Demo { val myset: Set[Int] = Set(1,2,5,8,9,6,4); val myset2: Set[Int] = Set(4,2,9,18,19,16,14); val names: Set[String] = Set("Max", "Tom", "John"); def main(args: Array[String]) { println(myset + 10); println(names("Maxxxx")); println(myset.head); println(myset.tail); println(myset.isEmpty); println(myset ++ myset2); println(myset.++(myset2)) println(myset.&(myset2)); println(myset.intersect(myset2)); println(myset.max); println(myset.min); myset.foreach(println); for (name <- names) { println(name); } } } /* OUTPUT: Set(5, 10, 1, 6, 9, 2, 8, 4) false 5 Set(1, 6, 9, 2, 8, 4) false Set(5, 14, 1, 6, 9, 2, 18, 16, 8, 19, 4) Set(5, 14, 1, 6, 9, 2, 18, 16, 8, 19, 4) Set(9, 2, 4) Set(9, 2, 4) 9 1 5 1 6 9 2 8 4 Max Tom John */ |
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// Scala - Lists object Demo { val mylist: List[Int] = List(1,2,5,8,9,6,4); val names: List[String] = List("Max", "Tom", "John"); def main(args: Array[String]) { println(0 :: mylist); println(mylist); println(names); println(1 :: 5:: 9 :: Nil); println(mylist.head); println(names.tail); println(mylist.tail); println(names.isEmpty); println(mylist.reverse); println(List.fill(5)(2)); println(mylist.max); mylist.foreach( println ) var sum : Int = 0; mylist.foreach(sum += _); println(sum); for (name <- names) { println(name); } println(names(0)); } } /* OUTPUT: List(0, 1, 2, 5, 8, 9, 6, 4) List(1, 2, 5, 8, 9, 6, 4) List(Max, Tom, John) List(1, 5, 9) 1 List(Tom, John) List(2, 5, 8, 9, 6, 4) false List(4, 6, 9, 8, 5, 2, 1) List(2, 2, 2, 2, 2) 9 1 2 5 8 9 6 4 35 Max Tom John Max */ |
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// Scala - Arrays import Array._ object Demo { val myarray: Array[Int] = new Array[Int](4); val myarray2 = new Array[Boolean](5); val myarray3 = Array(1,2,3,4,5,6,8); def main(args: Array[String]) { myarray(0) = 20; myarray(1) = 50; myarray(2) = 10; myarray(3) = 30; println(myarray3.length); val result = concat(myarray, myarray3); for (x <- result) { println(x); } for (i <- 0 to (myarray.length - 1)) { println(myarray(i)); } } } /* OUTPUT: 7 20 50 10 30 1 2 3 4 5 6 8 20 50 10 30 */ |
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// 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) */ |
In this post we will see How to install MongoDB on Mac OS X. MongoDB is one of the most used, […]
Currying is the technique of transforming a function that takes multiple arguments into a function that takes a single argument. […]
A closure is a function which uses one or more variables declared outside this function.
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// 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) } } |
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 tar is an acronym for Tape Archive. tar command is used to Manipulates archives […]
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