scala_tutorial

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Scala "Hello,\nWorld!" "This string contains a \" character." Multi-Line Strings A multi-line string literal is a sequence of characters enclosed in triple quotes """ ... """. The sequence of characters is arbitrary, except that it may contain three or more consecutive quote characters only at the very end. Characters must not necessarily be printable; newlines or other control characters are also permitted. Here is a multi-line string literal: """the present string spans three Lines.""" Null Values The null value is of type <strong>scala</strong>.Null and is thus compatible with every reference type. It denotes a reference value which refers to a special "null" object. Escape Sequences The following escape sequences are recognized in character and string literals. Escape Sequences Unicode Description \b \u0008 backspace BS \t \u0009 horizontal tab HT \n \u000c formfeed FF \f \u000c formfeed FF \r \u000d carriage return CR \" \u0022 double quote " \' \u0027 single quote . \\ \u005c backslash \ 16
Scala A character with Unicode between 0 and 255 may also be represented by an octal escape, i.e., a backslash '\' followed by a sequence of up to three octal characters. Following is the example to show few escape sequence characters: object Demo { } def main(args: Array[String]) { } println("Hello\tWorld\n\n" ); When the above code is compiled and executed, it produces the following result: Hello World 17
Page 2 and 3: Scala About the Tutorial Scala is a
Page 4 and 5: Scala 4. SCALA - DATA .............
Page 6 and 7: Scala Higher-Order Functions ......
Page 8 and 9: Scala Regular-Expression Examples .
Page 10 and 11: Scala Scala can Execute Java Code S
Page 12 and 13: Scala We assume that the readers of
Page 14 and 15: Scala Windows \>scala -version Scal
Page 16 and 17: Scala Welcome to Scala version 2.9.
Page 18 and 19: Scala $salary, 123abc, -salary Oper
Page 20 and 21: Scala Newline Characters Scala is a
Page 22 and 23: 4. SCALA - DATA Scala Scala has all
Page 26 and 27: 5. SCALA - VARIABLES Scala Variable
Page 28 and 29: Scala } Save the above program in D
Page 30 and 31: Methods Variables 6. SCALA - CLASSE
Page 32 and 33: Scala } Save the above program in D
Page 34 and 35: Scala \>scala Demo Output Point x l
Page 36 and 37: Scala Implicit classes may not be
Page 38 and 39: 7. SCALA - ACCESS MODIFIERS Scala T
Page 40 and 41: Scala } Scope of Protection Access
Page 42 and 43: 8. SCALA - OPERATORS Scala An opera
Page 44 and 45: Scala == (Equal) 1 Checks if the va
Page 46 and 47: Scala It is called Logical AND oper
Page 48 and 49: Scala Ex: (A & B) will give 12, whi
Page 50 and 51: Scala \>scala Demo Output: a & b =
Page 52 and 53: Scala Try the following example pro
Page 54 and 55: Scala c &= a = 0 c ^= a = 10 c |= a
Page 56 and 57: 9. SCALA - IF ELSE STATEMENT Scala
Page 58 and 59: Scala if(Boolean_expression){ //Exe
Page 60 and 61: Scala }else if( x == 30 ){ println(
Page 62 and 63: 10. SCALA - LOOP STATEMENTS Scala T
Page 64 and 65: Scala while(condition) { Conditiona
Page 66 and 67: Scala jumps back up to do, and the
Page 68 and 69: Scala object Demo { } def main(args
Page 70 and 71: Scala } } Save the above program in
Page 72 and 73: Scala Scala's for loop allows to fi
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Scala \>scalac Demo.scala \>scala D
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Scala object Demo { def main(args:
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Scala Output: Value of a: 1 Value o
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11. SCALA - FUNCTIONS Scala A funct
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Scala var sum:Int = 0 sum = a + b r
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Scala println("Arg value[" + i + "]
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Scala } Save the above program in D
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Scala logWithDateBound("message3" )
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Scala \>scala Demo Output Factorial
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Scala Currying Functions Currying t
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12. SCALA - CLOSURES Scala A closur
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13. SCALA - STRINGS Scala This chap
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Scala "My name is ".concat("Zara");
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Scala val name = “James” printl
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Scala b String Methods Following is
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Scala 27 28 29 30 31 32 33 34 35 36
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14. SCALA - ARRAYS Scala Scala prov
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Scala } println("Total is " + total
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Scala Save the above program in Dem
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Scala print( " " + x ) } println()
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15. SCALA - COLLECTIONS Scala Scala
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Scala val nums = Nil println( "Head
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Scala 1 2 3 4 5 6 7 8 9 10 11 12 13
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Scala 34 35 36 37 38 39 40 41 42 43
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Scala Find Common Values Insets You
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Scala 14 def diff(that: Set[A]): Se
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Scala 39 def sum: A Returns the sum
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Scala val nums: Map[Int, Int] = Map
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Scala colors.keys.foreach{ i => pri
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Scala 5 def iterator: Iterator[(A,
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Scala 30 def min: (A, B) Finds the
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Scala You can use Tuple to write a
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Scala Concatenated String: (1,hello
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Scala } } Save the above program in
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Scala 2 def isEmpty: Boolean Return
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Scala number of words Find Min & Ma
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Scala 4 def ++[B >: A](that :=> Gen
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Scala 28 def max: A Finds the large
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16. SCALA - TRAITS Scala A trait en
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Scala Value classes and Universal T
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17. SCALA - PATTERN MATCHING Scala
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Scala val charlie = new Person("Cha
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18. SCALA - REGULAR EXPRESSIONNS Sc
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Scala \\n Back-reference to capture
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Scala val pattern = new Regex("abl[
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Scala } } } } Save the above progra
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20. SCALA - EXTRACTORS Scala An ext
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Scala def main(args: Array[String])
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Scala print("Please enter your inpu
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