Reliable JavaScript: How to Code Safely in the World's Most Dangerous Language by Lawrence Spencer & Seth Richards

Author:Lawrence Spencer & Seth Richards [Spencer, Lawrence]
Language: eng
Format: azw3
ISBN: 9781119028741
Publisher: Wiley
Published: 2015-06-28T16:00:00+00:00

WROX.COM CODE DOWNLOADS FOR THIS CHAPTER

You can find the wrox.com code downloads for this chapter at www.wrox.com/go/reliablejavascript on the Download Code tab. The files are in the Chapter 13 download and individually named according to the filenames noted throughout this chapter.

The Strategy Pattern is used to isolate multiple algorithms, or strategies, that perform a specific task into modules that may be swapped in and out at run time. This chapter uses test-driven development to show how, through the use of strategies, algorithms may be added or removed in a way that’s independent from the client, or context, that uses them. The chapter will also describe how the Factory Pattern from Chapter 10 helps achieve this goal.

Additionally, the chapter will illustrate how programming to the interface of a strategy improves the testability, and thus reliability, of the code that consumes the strategy.

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