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of words C:/> Find Min & Max valued Element: You can use it.min and it.max methods to find out the minimum and maximum valued elements from an iterator. Following is the usage: object Test { def main(args: Array[String]) { val ita = Iterator(20,40,2,50,69, 90) val itb = Iterator(20,40,2,50,69, 90) } } println("Maximum valued element " + ita.max ) println("Minimum valued element " + itb.min ) Here, we used ita and itb to perform two different operations because iterator can be traversed only once. When the above code is compiled and executed, it produces the following result: C:/>scalac Test.scala C:/>scala Test Maximum valued element 90 Minimum valued element 2 C:/> Find the length of the Iterator: You can use either it.size or it.length methods to find out the number of elements available in an iterator. Following is the usage: object Test { def main(args: Array[String]) { val ita = Iterator(20,40,2,50,69, 90) val itb = Iterator(20,40,2,50,69, 90) println("Value of ita.size : " + ita.size ) println("Value of itb.length : " + itb.length ) } } Here, we used ita and itb to perform two different operations because iterator can be traversed only once. When the above code is compiled and executed, it produces the following result: C:/>scalac Test.scala C:/>scala Test Value of ita.size : 6 Value of itb.length : 6 C:/> TUTORIALS POINT Simply Easy Learning
<strong>Scala</strong> Iterator Methods: Following are the important methods which you can use while playing with Iterator. For a complete list of methods available, please check official documentation of <strong>Scala</strong>. SN Methods with Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 def hasNext: Boolean Tests whether this iterator can provide another element. def next(): A Produces the next element of this iterator. def ++(that: => Iterator[A]): Iterator[A] Concatenates this iterator with another. def ++[B >: A](that :=> GenTraversableOnce[B]): Iterator[B] Concatenates this iterator with another. def addString(b: StringBuilder): StringBuilder Returns the string builder b to which elements were appended. def addString(b: StringBuilder, sep: String): StringBuilder Returns the string builder b to which elements were appended using a separator string. def buffered: BufferedIterator[A] Creates a buffered iterator from this iterator. def contains(elem: Any): Boolean Tests whether this iterator contains a given value as an element. def copyToArray(xs: Array[A], start: Int, len: Int): Unit Copies selected values produced by this iterator to an array. def count(p: (A) => Boolean): Int Counts the number of elements in the traversable or iterator which satisfy a predicate. def drop(n: Int): Iterator[A] Advances this iterator past the first n elements, or the length of the iterator, whichever is smaller. def dropWhile(p: (A) => Boolean): Iterator[A] Skips longest sequence of elements of this iterator which satisfy given predicate p, and returns an iterator of the remaining elements. def duplicate: (Iterator[A], Iterator[A]) Creates two new iterators that both iterate over the same elements as this iterator (in the same order). def exists(p: (A) => Boolean): Boolean Returns true if the given predicate p holds for some of the values produced by this iterator, otherwise false. def filter(p: (A) => Boolean): Iterator[A] Returns an iterator over all the elements of this iterator that satisfy the predicate p. The order of the elements is preserved. def filterNot(p: (A) => Boolean): Iterator[A] Creates an iterator over all the elements of this iterator which do not satisfy a predicate p. def find(p: (A) => Boolean): Option[A] Finds the first value produced by the iterator satisfying a predicate, if any. 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
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
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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
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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
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Page 87 and 88: val t = new Tuple3(1, "hello", Cons
Page 89 and 90: The method will return Some[Person]
Page 91: 6 7 8 9 10 11 12 13 14 def filter(p
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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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