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18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 def flatMap[B](f: (A) => GenTraversableOnce[B]): Iterator[B] Creates a new iterator by applying a function to all values produced by this iterator and concatenating the results. def forall(p: (A) => Boolean): Boolean Returns true if the given predicate p holds for all values produced by this iterator, otherwise false. def foreach(f: (A) => Unit): Unit Applies a function f to all values produced by this iterator. def hasDefiniteSize: Boolean Returns true for empty Iterators, false otherwise. def indexOf(elem: B): Int Returns the index of the first occurrence of the specified object in this iterable object. def indexWhere(p: (A) => Boolean): Int Returns the index of the first produced value satisfying a predicate, or -1. def isEmpty: Boolean Returns true if hasNext is false, false otherwise. def isTraversableAgain: Boolean Tests whether this Iterator can be repeatedly traversed. def length: Int Returns the number of elements in this iterator. The iterator is at its end after this method returns. def map[B](f: (A) => B): Iterator[B] Returns a new iterator which transforms every value produced by this iterator by applying the function f to it. def max: A Finds the largest element. The iterator is at its end after this method returns. def min: A Finds the minumum element. The iterator is at its end after this method returns. def mkString: String Displays all elements of this traversable or iterator in a string. def mkString(sep: String): String Displays all elements of this traversable or iterator in a string using a separator string. def nonEmpty: Boolean Tests whether the traversable or iterator is not empty. def padTo(len: Int, elem: A): Iterator[A] Appends an element value to this iterator until a given target length is reached. def patch(from: Int, patchElems: Iterator[B], replaced: Int): Iterator[B] Returns this iterator with patched values. def product: A Multiplies up the elements of this collection. def sameElements(that: Iterator[_]): Boolean Returns true, if both iterators produce the same elements in the same order, false otherwise. def seq: Iterator[A] Returns a sequential view of the collection. TUTORIALS POINT Simply Easy Learning
38 39 40 41 42 43 44 45 46 47 48 49 50 def size: Int Returns the number of elements in this traversable or iterator. def slice(from: Int, until: Int): Iterator[A] Creates an iterator returning an interval of the values produced by this iterator. def sum: A Returns the sum of all elements of this traversable or iterator with respect to the + operator in num. def take(n: Int): Iterator[A] Returns an iterator producing only of the first n values of this iterator, or else the whole iterator, if it produces fewer than n values. def toArray: Array[A] Returns an array containing all elements of this traversable or iterator. def toBuffer: Buffer[B] Returns a buffer containing all elements of this traversable or iterator. def toIterable: Iterable[A] Returns an Iterable containing all elements of this traversable or iterator. This will not terminate for infinite iterators. def toIterator: Iterator[A] Returns an Iterator containing all elements of this traversable or iterator. This will not terminate for infinite iterators. def toList: List[A] Returns a list containing all elements of this traversable or iterator. def toMap[T, U]: Map[T, U] Returns a map containing all elements of this traversable or iterator. def toSeq: Seq[A] Returns a sequence containing all elements of this traversable or iterator. def toString(): String Converts this iterator to a string. def zip[B](that: Iterator[B]): Iterator[(A, B) Returns a new iterator containing pairs consisting of corresponding elements of this iterator and that. The number of elements returned by the new iterator is the minimum of the number of elements returned by this iterator and that. Example: Following code snippet is a simple example to define all the above type of collections: // Define List of integers. val x = List(1,2,3,4) // Define a set. var x = Set(1,3,5,7) // Define a map. val x = Map("one" -> 1, "two" -> 2, "three" -> 3) // Create a tuple of two elements. val x = (10, "<strong>Scala</strong>") TUTORIALS POINT Simply Easy Learning
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Scala Tutorial
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ABOUT THE TUTORIAL Scala Tutorial S
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FLOATING POINT LITERALS ...........
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Scala Strings .....................
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CHAPTER 1 Scala Overview Scala, sho
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CHAPTER 2 Scala Environment Setup T
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$scala -version Scala code runner v
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} * This will print 'Hello World' a
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forSome If implicit import Lazy Mat
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CHAPTER 4 Scala Data Types Scala ha
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Characters must not necessarily be
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Variable Type Inference: When you a
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The access to f in class Sub is OK
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var a = 10; var b = 20; var c = 25;
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} } println("a && b = " + (a&&b) );
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a >>> 15 C:/> Assignment Operators:
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Here, operators with the highest pr
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} If the boolean expression evaluat
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Nested if...else Statement: It is a
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while loop do...while loop for loop
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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 and 64: 23 24 25 26 27 28 29 30 31 32 33 34
Page 65 and 66: CHAPTER 13 Scala Arrays Scala provi
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: Scala Iterator Methods: Following a
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
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