--- a/Fahad/Scala/WorkSheet.sc Wed Jan 21 12:32:17 2015 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,81 +0,0 @@
-package greeter
-
-object WorkSheet {
- println("Welcome to the Scala worksheet") //> Welcome to the Scala worksheet
-
- val x = 5 //> x : Int = 5
- def increase(i: Int) = i + 1 //> increase: (i: Int)Int
- increase(x) //> res0: Int = 6
-
- // Expressions And Simple Functions
-
- 87 + 145 //> res1: Int(232) = 232
- 5 + 2 * 3 //> res2: Int = 11
-
- "Hello" + " World!" //> res3: String("Hello World!") = Hello World!
-
- def scale = 5 //> scale: => Int
- 7 * scale //> res4: Int = 35
-
- def pi = 3.141592653589793 //> pi: => Double
- def radius = 10 //> radius: => Int
- 2 * pi * radius //> res5: Double = 62.83185307179586
-
- // PARAMETERS
-
- def square(x: Double) = x * x //> square: (x: Double)Double
- square(2) //> res6: Double = 4.0
- square(square(4)) //> res7: Double = 256.0
-
- def sumOfSquares(x: Double, y: Double) = square(x) + square(y)
- //> sumOfSquares: (x: Double, y: Double)Double
- sumOfSquares(3, 2 + 2) //> res8: Double = 25.0
-
- def loop: Int = loop //> loop: => Int
- def first(x: Int, y: Int) = x //> first: (x: Int, y: Int)Int
- def constOne(x: Int, y: => Int) = 1 //> constOne: (x: Int, y: => Int)Int
- constOne(1, loop) //> res9: Int = 1
-
- // 4.3 CONDITIONAL EXPRESSIONS
-
- def abs(x: Double) = if (x >= 5) x + 1 else x - 1
- //> abs: (x: Double)Double
- abs(4) //> res10: Double = 3.0
-
- // 4.4: Square Roots by Newton's Method
-
- def sqrtIter(guess: Double, x: Double): Double =
- if (isGoodEnough(guess, x)) guess
- else sqrtIter(improve(guess, x), x) //> sqrtIter: (guess: Double, x: Double)Double
-
- def improve(guess: Double, x: Double) =
- (guess + x / guess) / 2 //> improve: (guess: Double, x: Double)Double
-
- def isGoodEnough(guess: Double, x: Double) =
- abs(square(guess) - x) < 0.001 //> isGoodEnough: (guess: Double, x: Double)Boolean
-
- //def sqrt(x: Double) = sqrtIter(1.0, x)
- //sqrt(25)
-
- // 4.5: Nested Functions
-
- def sqrt(x: Double) = {
- def sqrtIter(guess: Double): Double =
- if (isGoodEnough(guess)) guess
- else sqrtIter(improve(guess))
- def improve(guess: Double) =
- (guess + x / guess) / 2
- def isGoodEnough(guess: Double) =
- abs(square(guess) - x) < 0.001
- sqrtIter(1.0)
- } //> sqrt: (x: Double)Double
- sqrt(25) //> res11: Double = 1.0
-
- // 4.6: Tail Recursion
-
- def gcd(a: Int, b: Int): Int = if (b == 0) a else gcd(b, a % b)
- //> gcd: (a: Int, b: Int)Int
-
- gcd(21, 36) //> res12: Int = 3
-
-}
\ No newline at end of file