Scala

The Scala Programming Language presented by Donna Malayeri

Why a new language? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Features of Scala ,[object Object],[object Object],[object Object],[object Object],[object Object]

More features ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Other features ,[object Object],[object Object],[object Object]

Automatic Closure Construction ,[object Object],[object Object],[object Object]

While loop example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Define loopWhile method Use it with nice syntax

Scala object system ,[object Object],[object Object],[object Object],[object Object],[object Object]

Classes and Objects ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Traits ,[object Object],[object Object],[object Object],[object Object]

Example of traits ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Mixin class composition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Mixin class composition example ColoredPoint2D Point2D class Point3D (xc: Int, yc: Int, zc: Int) extends Point2D (xc, yc) { val z = zc; // code for manipulating Point3Ds } Point3D class ColoredPoint3D (xc: Int, yc: Int, zc: Int, col: String) extends Point3D (xc, yc, zc) with ColoredPoint2D (xc, yc, col); ColoredPoint3D ColoredPoint2D

Mixin class composition ,[object Object],[object Object],[object Object],[object Object]

Mixin class composition ,[object Object],[object Object],[object Object]

Views ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Views ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],val s: Set = xs; xs contains x val s: Set = view (xs); view (xs) contains x

Compound types motivation ,[object Object],[object Object],[object Object],[object Object],[object Object],trait Resetable { def reset: Unit; } trait Cloneable { def clone(); }

Compound types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Variance annotations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Variance Annotations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Variance Annotations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Types as members ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Discussion/Critiques ,[object Object],[object Object],[object Object],[object Object]

Scala

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Scala