Download Becoming Functional by Joshua Backfield PDF

By Joshua Backfield

When you have an primary (and most likely object-oriented) programming heritage, this hands-on publication will advisor you thru the alien international of useful programming. writer Joshua Backfield starts off slowly through exhibiting you the way to use the main worthwhile implementation techniques earlier than taking you extra into functional-style innovations and practices.

In each one bankruptcy, you’ll research a useful notion after which use it to refactor the fictitious XXY company’s imperative-style legacy code, writing and checking out the useful code your self. As you move in the course of the e-book, you’ll migrate from Java 7 to Groovy and at last to Scala because the desire for greater useful language aid steadily increases.

• research why today’s finely tuned functions paintings larger with sensible code
• rework imperative-style styles into useful code, following simple steps
• wake up to hurry with Groovy and Scala via examples
• know the way top quality features are handed and lower back from different functions
• Convert present equipment into natural capabilities, and loops into recursive methods
• swap mutable variables into immutable variables
• Get hands-on adventure with statements and nonstrict evaluations
• Use useful programming along object-oriented layout

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Extra info for Becoming Functional

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We construct our model as described in Chapter 1, “Introduction to EMF” on page 3. We use the Sample Ecore Model Editor, but you may choose to edit the XMI directly, or use the Omondo EclipseUML plug-in. We create an EPackage named workflow, and within it, create EClasses to represent Task, Edge, Port, OutputPort, and InputPort. Tip: If you are using the model to drive code generation, we suggest that you follow Java conventions for naming model elements: Heed Java case conventions: – Use lower case for package names.

Note: The sample code we describe in this chapter is available as part of the redbook additional material. See Appendix A, “Additional material” on page 225 for details on how to obtain and work with the additional material. The sample code for this chapter is provided as Eclipse projects that can be imported into your Eclipse workbench. Each major section of this chapter has a matching Eclipse project in the additional material. The projects are cumulative and they also depend on your having completed the modelling and code generation described in Chapter 1, “Introduction to EMF” on page 3.

The XSD plug-in uses EAnnotations to map model objects to XML. Chapter 2. 2 Migrating existing models The EMF documentation describes how to import from models expressed using annotated Java interfaces, models created using Rational Rose®, and models represented by an XML Schema. In this section, we discuss migrating existing models, focusing on migrating an XML Schema to EMF as an example. We provide examples to illustrate the correspondences between concepts from XML Schema and concepts provided by EMF Ecore.

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