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2. Broken Windows story Broken windows

6. Lesson: Me sy things get m r

7. Make it work, right, fast Make it work Make it right Make it fast Lesson: Me sy things get m r

8. Make it work, right, fast code Make it work Make it right Make it fast Lesson: Me sythings get m r

9. Refactoring: from Turkey to Peacock in thousand steps CS2103/T, Lecture 2, Part 2, [Aug 23, 2013]

10. Refactoring Bug fixing == Refactoring? REFACTORING [Improving structure incrementally without modifying behaviour]

11. Refactoring • Rewriting REFACTORING [Improving structure incrementally without modifying behaviour]

12. Catalog memorize

13. Example: Introduce Explaining Variable if ( (platform.toUpperCase().indexOf("MAC") > -1) && (browser.toUpperCase().indexOf("IE") > -1) && wasInitialized() && resize > 0 ) {…} final boolean isMacOs= platform.toUpperCase().indexOf("MAC") > -1; final boolean isIEBrowser= browser.toUpperCase().indexOf("IE") > -1; final boolean wasResized= resize > 0; if (isMacOs && isIEBrowser && wasInitialized() && wasResized) {…}

14. IDE support

15. Regression test REFACTORING [Improving structure incrementally without modifying behaviour]

16. It’s not rocket surgery! Regression test REFACTORING [Improving structure incrementally without modifying behaviour]

17. Regression test REFACTORING [Improving structure incrementally without modifying behaviour]