Download Scala Tutorial (PDF Version) - Tutorials Point

More documents

Recommendations

Info

43 44 45 46 String toUpperCase() Converts all of the characters in this String to upper case using the rules of the default locale. String toUpperCase(Locale locale) Converts all of the characters in this String to upper case using the rules of the given Locale. String trim() Returns a copy of the string, with leading and trailing whitespace omitted. static String valueOf(primitive data type x) Returns the string representation of the passed data type argument. TUTORIALS POINT Simply Easy Learning
CHAPTER 13 <strong>Scala</strong> Arrays <strong>Scala</strong> provides a data structure, the array, which stores a fixed-size sequential collection of elements of the same type. An array is used to store a collection of data, but it is often more useful to think of an array as a collection of variables of the same type. Instead of declaring individual variables, such as number0, number1, ..., and number99, you declare one array variable such as numbers and use numbers[0], numbers[1], and ..., numbers[99] to represent individual variables. This tutorial introduces how to declare array variables, create arrays, and process arrays using indexed variables. The index of the first element of an array is the number zero and the index of the last element is the total number of elements minus one. Declaring Array Variables: To use an array in a program, you must declare a variable to reference the array and you must specify the type of array the variable can reference. Here is the syntax for declaring an array variable: var z:Array[String] = new Array[String](3) or var z = new Array[String](3) Here, z is declared as an array of Strings that may hold up to three elements. You can assign values to individual elements or get access to individual elements; it can be done by using commands like the following: z(0) = "Zara"; z(1) = "Nuha"; z(4/2) = "Ayan" Here, the last example shows that in general the index can be any expression that yields a whole number. There is one more way of defining an array: var z = Array("Zara", "Nuha", "Ayan") Following picture represents array myList. Here, myList holds ten double values and the indices are from 0 to 9. TUTORIALS POINT Simply Easy Learning
Page 1 and 2:
Scala Tutorial
Page 3 and 4:
ABOUT THE TUTORIAL Scala Tutorial S
Page 5 and 6:
FLOATING POINT LITERALS ...........
Page 7 and 8:
Scala Strings .....................
Page 9 and 10:
CHAPTER 1 Scala Overview Scala, sho
Page 11 and 12:
CHAPTER 2 Scala Environment Setup T
Page 13 and 14: $scala -version Scala code runner v
Page 15 and 16: } * This will print 'Hello World' a
Page 17 and 18: forSome If implicit import Lazy Mat
Page 19 and 20: CHAPTER 4 Scala Data Types Scala ha
Page 21 and 22: Characters must not necessarily be
Page 23 and 24: Variable Type Inference: When you a
Page 25 and 26: The access to f in class Sub is OK
Page 27 and 28: var a = 10; var b = 20; var c = 25;
Page 29 and 30: } } println("a && b = " + (a&&b) );
Page 31 and 32: a >>> 15 C:/> Assignment Operators:
Page 33 and 34: Here, operators with the highest pr
Page 35 and 36: } If the boolean expression evaluat
Page 37 and 38: Nested if...else Statement: It is a
Page 39 and 40: while loop do...while loop for loop
Page 41 and 42: Flow Diagram: Example: object Test
Page 43 and 44: When the above code is compiled and
Page 45 and 46: } } // for loop execution with mult
Page 47 and 48: Flow Diagram: Example: import scala
Page 49 and 50: Infinite Loop: A loop becomes infin
Page 51 and 52: } } return sum A function, which do
Page 53 and 54: When the above code is compiled and
Page 55 and 56: } When the above code is compiled a
Page 57 and 58: } logWithDateBound("message1" ) log
Page 59 and 60: CHAPTER 12 Scala Strings Consider t
Page 61 and 62: } } var str2 = "Tod"; println("Dot
Page 63: 23 24 25 26 27 28 29 30 31 32 33 34
Page 67 and 68: C:/> Multi-Dimensional Arrays: Ther
Page 69 and 70: C:/> Scala Arrays Methods: Followin
Page 71 and 72: Scala Lists Scala Lists are quite s
Page 73 and 74: Creating Uniform Lists: You can use
Page 75 and 76: 13 14 15 16 17 18 19 20 21 22 23 24
Page 77 and 78: var s = Set(1,3,5,7) While defining
Page 79 and 80: C:/> Scala Set Methods: Following a
Page 81 and 82: elements. 38 39 40 41 42 43 44 45 4
Page 83 and 84: use two maps with ++ as method colo
Page 85 and 86: 11 12 13 14 15 16 17 18 19 20 21 22
Page 87 and 88: val t = new Tuple3(1, "hello", Cons
Page 89 and 90: The method will return Some[Person]
Page 91 and 92: 6 7 8 9 10 11 12 13 14 def filter(p
Page 93 and 94: Scala Iterator Methods: Following a
Page 95 and 96: 38 39 40 41 42 43 44 45 46 47 48 49
Page 97 and 98: CHAPTER 15 Scala Classes & Objects
Page 99 and 100: } } println ("Point y location : "
Page 101 and 102: CHAPTER 16 Scala Traits A trait enc
Page 103 and 104: CHAPTER 17 Scala Pattern Matching P
Page 105 and 106: } // case class, empty one. case cl
Page 107 and 108: } When the above code is compiled a
Page 109 and 110: [0-9] Match any digit; same as [012
Page 111 and 112: CHAPTER 19 Scala Exception Handling
Page 113 and 114: CHAPTER 20 Scala Extractors An extr
Page 115 and 116:
CHAPTER 21 Scala Files I/O Scala is
show all

Download Scala Tutorial (PDF Version) - Tutorials Point

Create successful ePaper yourself

Delete template?

Save as template?