CSC/ECE 517 Fall 2013/ch1 1w07 d: Difference between revisions
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The practice of [http://en.wikipedia.org/wiki/Code_refactoring code refactoring] deals with changing the content or structure of code without changing the code's function in its execution. Code refactoring has become a standard programming practice, as it potentially promotes readability, extensibility, and reusability of code. | The practice of [http://en.wikipedia.org/wiki/Code_refactoring code refactoring] deals with changing the content or structure of code without changing the code's function in its execution. Code refactoring has become a standard programming practice, as it potentially promotes readability, extensibility, and reusability of code. | ||
Whether done through an IDE or by hand, large-scale code projects can prove tedious to refactor. If minimal non-functional benefits are achieved through refactoring, time is | Whether done through an IDE or by hand, large-scale code projects can prove tedious to refactor. If minimal non-functional benefits are achieved through refactoring, time is wasted. Furthermore, if not done properly, code refactoring can actually break the functionality of the code. | ||
wasted. Furthermore, if not done properly, code refactoring can actually break the functionality of the code. | |||
==Metrics== | ==Metrics== | ||
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In this example, there are two decision points, so the cyclomatic complexity is 2+1=3. | |||
===Lines of Code=== | ===Lines of Code=== | ||
Revision as of 14:23, 18 September 2013
Background
The practice of code refactoring deals with changing the content or structure of code without changing the code's function in its execution. Code refactoring has become a standard programming practice, as it potentially promotes readability, extensibility, and reusability of code.
Whether done through an IDE or by hand, large-scale code projects can prove tedious to refactor. If minimal non-functional benefits are achieved through refactoring, time is wasted. Furthermore, if not done properly, code refactoring can actually break the functionality of the code.
Metrics
There are a variety of metrics that are used to quantify the merits of refactoring.
Complexity
Cyclomatic Complexity is a metric whose value is determined by the number of decision points in the code.
public void makeDecision(condition) {
if(condition a) {
choose(a);
}
else {
choose(b);
}
}
In this example, there are two decision points, so the cyclomatic complexity is 2+1=3.