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Broken windows Broken Windows story

Lesson: Me sy things get m r

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

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

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

Refactoring Bug fixing == Refactoring?

Refactoring Rewriting

Catalog memorize

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) {…}

IDE support

Regression test

It’s not rocket surgery!

Regression test