Now, let’s discuss further about the following invalid optimizations that many developers try to perform, Do not try to minimize the number of method calls. This can be static. The statement has the ability to change the flow of execution in your program, jumping around in memory. Consequence of applying this technique is that lambdas are dynamically adapting to the changing situation in the system. Wrap functionality that is not directly related to business logic into separate methods. We still have the if-then-else statement which is there to make decision about the separator. This article describes refactoring a switch statement in order to reduce Cyclomatic complexity. This implicitly says that loyalty discount should be added exactly once. This would result in the following simple code that even a BA can understand. In order to elaborate on above steps, let’s take the following method as an example. In this series of articles we were refactoring one simple e-commerce application. Instead of printing the separator after the element, we are printing it before element. About ruwandotnetI am a fan of Microsoft .Net related technologies. Consumers can then simply invoke members on the Null Object the same way as they did on the previously non-null object. Its probably not just about cyclomatic complexity, but just complexity period. Back to the problem. That is how we can reduce cyclomatic complexity of our code. Discount must be assigned only once. And right there comes the mind bending moment. This will also lower cyclomatic complexity, but main reason why I recommend it is that with this block, there is no way for caller code to distinguish legally parsed 0 from number format exception. It reduces the coupling of code. Cyclomatic complexity is a software metric used to measure the complexity of a program. The first may be to use a MVC or MVVM structure to separate your UI from your data access layer. This is because the system is supposed to produce a different object next time the same factory method is used. We are making a decision based on the index of the index of the current element. Add private methods with meaningful names to wrap each meaningful piece of domain logic. But if we take a closer look at the if statement in the RegisterPurchase method, we can see that it depends on two variables. Separator is here hard-coded as the argument to the Write method, but it could equally be stored outside the loop as a string. This application has one business rule: When registered user spends more than $100 buying stuff, he becomes eligible for a 5% discount on all subsequent purchases. When the last element is reached, we just start the new line, without appending another comma. I'd define a mapping of Strings to the functions they correspond with. Note that the requirement begins with "If", and implementation also begins with if statement. This can significantly reduce the number of lines and improve readability of your code. Therefore we always have to be specific in string comparison method. Applied to the e-commerce application, this means that the class with five gradual levels of loyalty discounts has the same complexity as the class with only one level. Adding that condition explicitly as part of the if statement is what cannot be justified. In all the previous methods, we resolved Cyclomatic Complexity by taking a method with 8 branches, and reducing that 1 method to 0 branches. ( Log Out / The first step will be to isolate the decision to create the loyalty discount: Once again, we see our old friend Option
functional type. Based on Bootstrap template created by @mdo, How to Reduce Cyclomatic Complexity - Extension Methods, Next: How to Reduce Cyclomatic Complexity Part 10: Domain Logic in Factories, Previous: How to Reduce Cyclomatic Complexity Part 8: Map-Reduce Queries, How to Reduce Cyclomatic Complexity Part 5: Option Functional Type, How to Reduce Cyclomatic Complexity Part 7: Extension Methods, The Fast Pencil Fallacy in Software Development, Favoring Object-oriented over Procedural Code: A Motivational Example, From Dispose Pattern to Auto-disposable Objects in .NET, What Makes Functional and Object-oriented Programming Equal, Overcoming the Limitations of Constructors, Mastering Iterative Object-oriented Programming in C#, Making Your Java Code More Object-oriented, Tactical Design Patterns in .NET: Creating Objects, Tactical Design Patterns in .NET: Control Flow, Tactical Design Patterns in .NET: Managing Responsibilities, Advanced Defensive Programming Techniques, Counting Intersection of Two Unsorted Arrays, Moving Zero Values to the End of the Array, Finding Minimum Weight Path Through Matrix, Finding Numbers Which Appear Once in an Unsorted Array. Instead, declare variables at the exact point that you need it, Do not reuse the same variable for multiple purposes, Avoid following steps that many developers performed, assuming that they are optimizing the code for performance (they are not required for modern compilers). This method implements the following algorithm. Zoran Horvat is the Principal Consultant at Coding Helmet, speaker and author of 100+ articles, and independent trainer on .NET technology stack. So we have traded one method with cyclomatic complexity 3 for a method with complexity 2. One of the simplest tools we can use to reduce cyclomatic complexity of our code is to avoid if-else statements based on test whether some reference is null or not. Do not use string.Concat to concatenate strings, use ‘+’ symbol instead. To enhance this code, observe what we are doing in the positive and in the negative branch of the if-then-else statement. ( Log Out / This score helps you determine how complex your code is. Change ), You are commenting using your Google account. java complexity-theory reduce . “Indeed, the ratio of time spent reading versus … Bottom line is that the if-then-else statement was removed from the function. Reduce cyclomatic complexity switch case swift. Use small methods Try reusing code wherever possible and create smaller methods which accomplish specific tasks. Cyclomatic complexity for this method is 19 and it’s too complex. This requirement is implemented in the User class like this: Whenever a User object is used to buy something, domain service calls the RegisterPurchase on that User object so that it can add a newly acquired discount to the list of discounts. JetBrains ReSharper ; CodeRush And, not to forget, the model you develop in this way will be correct and free of bugs. C# compiler compiles the above statement where a, b and c are string type variables. Cyclomatic complexity calculation is one of the standard approaches to calculate the source code complexity and determine the risk that the source code possesses for any future modification and maintenance. In terms of cyclomatic complexity, this method has three independent paths. Once these rules are applied, your public business logic methods should be readable as English without having to enter any comments. You can already start looking at ways to reduce complexity. Net result is that the discount, if created, will be added to the list of discounts. The cyclomatic complexity also affects other software metrics, like code maintainability index. This calculation logic depends on the account type. How would it go if we used a function to calculate a separator? Lambdas which produce objects also change themselves! He can often be found speaking at conferences and user groups, promoting object-oriented development style and clean coding practices and techniques that improve longevity of complex business applications. Also I think it will be nice to move switch to separate method since it looks like something witch will be used in many different places. But, these are not ordinary factory methods. The first time we pass the loop, the flag is turned into something else. But what if your code’s cyclomatic complexity is even higher? Then this method can be broken as follows, if (string.Equals(string1, string2, StringComparison.Ordinal)). Since “b”+”c”+”d” is more readable than string.Concat(“b”,”c”,”d”), + symbol is prefered over string.Concat. In fact, lower numbers are better and usually complexity under 10 is good. (We’ll see what you can do to reduce complexity later in the article.) Note that TryAssignLoyaltyDiscount method is changed to use this lambda, rather than the previously used deterministic function. Take a look at this classic example. But we can turn the tables and act upon the first element instead: This time, the loop is sensitive to the first element indicator. https://www.perforce.com/blog/qac/what-cyclomatic-complexity What I say here is that the expression “b” + “c” + “d” is compiled by C# compiler as string.Concat(“b”,”c”,”d”). It is nearly impossible to maintain and develop this application further, due to its poor structure and design. This is because lower cyclomatic complexity results in higher cohesion and fewer anticipated defects within modules [SteinEtAl2005]. Therefore what ever happen in previous case will happen for the latter as well. Paths counted in complexity shows that a program written by a program is complex or we can go ahead and reduce the complexity. Whenever I lint a piece of code I'm working on I get the This function's cyclomatic complexity is too high i.e. Since ‘+’ symbol is more readable than using ‘Cancat’ method, that should be the preferred way to concatenate multiple strings. If this total OD amount is greater than this limit then issue the OD, If not, initiate the manager approval workflow. something like “b” + “c” + “d” creates a new object “cd” in memory, then a new object “bcd”, won’t happen in new version? The cyclomatic complexity is calculated from a control flow graph of the method and is given as follows: cyclomatic complexity = the number of edges - the number of nodes + 1. Now that we have identified one needless branching condition, we can try to remove it. In some cases, it is really not possible at first site. Cyclomatic complexity may also be applied to individual functions, modules, methods or classes within a program. Another path is executed when hasReceivedLoyaltyDiscount is False, but totalPurchases is less or equal to $100 - once again, the if block is skipped. This code also has the same risk of breaking the functionality without any compiler errors, if the order of the lines is changes as follows. Null Object design pattern is helpful in situations when there is a legitimate object which can stand in place of the null reference. Example shown there exhibits one feature which was not mentioned at that point, and that is … In this article we have demonstrated one technique for which we can freely say that it is mind bending. Since C# compiler can optimize the performance by inline the code, reducing the no of method calls does not give any performance gain. This change was made to let the method resemble its purpose more closely. Inside the loop, we are oblivious of the collection's length. Besides calculating cyclomatic complexity, NDepend can track other code quality issues (percent of code covered by unit tests, methods that could have lower visibility, unused classes/properties, etc. But it can turn out to be of higher value in some more complicated cases. At the same time, this branching statement doesn't contain the additional condition that the discount has already been assigned to the user. Reduce if/else statements Most often, we don’t need an else statement, as we can just use return inside the ‘if’ statement. Role of Software Architecture in Agile Software Development, My Presentation at Stack Overflow meetup in Sri Lanka, How to Reduce Cyclomatic Complexity of a method, Add private methods with meaningful names to remove duplicate code, Add private methods with meaningful names to wrap any functionalities that are not directly related to business logic such as, Add private methods with meaningful names to wrap each meaningful piece of domain logic, Refactor each method using following rules, Perform input validations first and either return an error output or throw an exception if the validation fails, Then perform business data validations and either return an error output or throw an exception if the validation fails, Add comments that say why rather than what, Do not declare all the variables at the beginning of the method. We can also get 100% code coverage with 1 unit test. 2 answers. This method uses strategy pattern to perform business logic specific to each account type. Therefore it is probably not the best option in simple cases. One of the primary causes of rising complexity are branching statements - if-then-else and switch statements. Following are the key steps to follow, in order to refactor a complex method into simple readable code. A high flow complexity may be a symptom of a method which does too much or has low cohesion. Cyclomatic complexity metrics are an important indicator of your source code’s readability, maintainability, and portability. If this method is written with all variables defined at the beginning of the method, it would look like the one below. In the previous example with comma-separated printout, we have used a string to hold information about the next separator to put between the numbers. Many tools are available for determining the complexity of the application. Thanks Ruwan for this I learned a lot from this. Cyclomatic complexity is a measure which indicates how many independent paths there are through a segment of code. 2. But this is the first step towards a better solution, the one which does not have to branch. This course begins with examination of a realistic application, which is poorly factored and doesn't incorporate design patterns. Visual Studio - There are plenty of extensions out there along with built-in functionality for cyclomatic complexity out-of-the-box. It is not required because data that we use in the loop, such as the separator, can be used to piggyback control information, such as the flag used to branch execution. That precise condition is only implicitly present in the requirements. This article will be my cheat sheet at code reviews. This solution is quite satisfactory to the problem at hand. When the discount is assigned, the system state is modified so that the assignment is not executed ever again. Else branch prints comma and a space. ( Log Out / 8 Comments. As soon as the getSeparator is executed for the first time, the function changes the getSeparator itself to point to a completely different lambda - this time, the lambda which just returns a comma. These metric, measures independent paths through program source code. The calculation of Cyclomatic Complexity is done using the control flow diagram or graph. Explicit branching is not required anymore. All the best practices in a single place. The problem could be complicated further by dropping the condition that we are printing out the array. The more complex your code is, the more time and resources you'll need to develop it, maintain it, and the more likely it is to have bugs versus code with a lower complexity score. Notice that cyclomatic complexity of this method is 2. This change in the system state is setting the hasReceivedLoyaltyDiscount flag to True. The ifstatement is one of the most common and powerful tools used in programming. Solution like this is an overkill for the comma-separated printout problem. Consequently, the system complexity will remain constant as more and more such methods are added to the class. One of the metrics it provides is McCabe's Cyclomatic Complexity. Since C# compiler never compile a code like “if (n = 10)” we do not need this hack any more. The point about this exercise is in the separator placed between numbers: In this implementation, we are using comma and a space in all cases except when the last element of the array is printed out. ( Log Out / Then branch clears the isFirst flag and prints nothing. One testing strategy, called basis path testing by McCabe who first proposed it, is to test each linearly independent path through the program; in this case, the number of test cases will equal the cyclomatic complexity of the program. Business requirement says that 5% loyalty discount should be applied to all subsequent purchases. How to Reduce Cyclomatic Complexity of a method Key Steps Following are the key steps to follow, in order to refactor a complex method into simple readable code. (Lower Bound) As in the above example — we have 4 as cyclomatic complexity… Therefore, this article discusses, through the application of design patterns, refactoring code with higher cyclomatic complexity into a structure where constituents have lower individual cyclomatic complexity. These observation lead to a completely different and much simpler implementation: The isFirst flag is gone, replaced by a string. So the decision is now made about which separator precedes the number, rather than which separator appears after the number. user3431624. On the other hand, traditional implementation with branching statements would become significantly more complex when additional levels of discounts are added. A cyclomatic complexity value between 5 and 7 is when things start unravelling. Create a free website or blog at WordPress.com. By the end of the course, you will know how code refactoring and design patterns can operate together, and help each other create great design. It’s a great explanation Ruwan. Reducing Cyclomatic Complexity with Python. In the previous article in this series we have discussed use of factory methods in the domain class (see How to Reduce Cyclomatic Complexity: Switchable Factory Methods for details). This is really helpful and uncovers important concepts that we often forgotten, and put our selves in trouble. This method creates the discount if condition is met. You can try the following steps to reduce both the cyclomatic complexity and the NPath complexity of your code. you mean to say, Change ), You are commenting using your Facebook account. We could also suspect that it is printing an empty string. This method also initiates a workflow if an approval is needed. Notice that if the order of the statements is changed as follows during a refactoring operation, you will get a totally different result, without any compiler error. Reduce Cyclomatic Complexity of Switch Statement - Sonar, In that case complexity will reduce by 4 or may be more. Suppose a program has a cyclomatic complexity of 5.that means there are 5 different independent paths through the method. So, the more of those commands, the more complex and high your Cyclomatic Complexity will be. That is one situation in which branching can be justified. When the last element is reached, we just start the new line, without appending another comma. Ease of testing. Add private methods with meaningful names… In case of the discount, we have the same situation. DRY (Do not Repeat Yourself) is one of the fundamental principle of software engineering. In this, the measure of those paths is calculated that are linearly independent. To implement this requirement, we will use the factory method for loyalty discounts: Loyalty discount is now created using a factory method, which is defined as a lambda function. 1. Once these rules are applied, your public business logic methods should be readable as English without having to enter any comments. The trick is that all these methods have the same structure. This might give you unexpected result, based on the current culture of the user (user’s browser, in case of a web application). I find your approach clearer in this case - probably because a/b/c have no business meaning to me. A similar impact is there if we attempt to reuse a variable as shown in the below example. This is an optimization that is handled by C# compiler and we don’t have to do it again. Use Visual Studio IDE to perform the following refactoring’s, Then add the comments that explain why (what is now clearly visible from the code). As demonstration after demonstration will unfold, we will refactor this entire application, fitting many design patterns into place almost without effort. This metric is useful because of properties of Cyclomatic complexity (M) - M can be number of test cases to achieve branch coverage (Upper Bound) M can be number of paths through the graphs. Negative branch is then there to just print the separator. Keep up the good work Ruwan. That is the situation in which switchable factory methods and switchable lambdas in general gain value. In this article, I have provided a way to do that. That is an example of needless increasing of the code complexity, which in turn reduces code readability and makes it harder to understand what the method is doing. Lower the Cyclomatic complexity better is the code quality in terms of complexity. That is exactly the same thing that happened to the isFirst flag before. This function looks straight-forward, but it contains one branching statement. This business logic method uses AccountRepository and TransactionHistoryRepository properties of the class to perform data access operations and CreditHistoryServiceAgent property to perform web service calls. But we will still use the same problem statement to demonstrate one more general idea. For many years I was declaring the variables on the begging of the method. Consider the code below. Reduce Cyclomatic complexity while processing DataRows Tag: c# , design , cyclomatic-complexity I have the following piece of code which checks if a particular DataRow has a column of a particular name and if it is not NULL. As you can guess, there are a number of tools to assist with cyclomatic complexity while writing code. Hence, lower the Cyclomatic Complexity number the lesser is the risk to modify it and vice-versa. Change ), You are commenting using your Twitter account. Please add more…. Otherwise, if requested amount is not fulfilled yet, this method just returns an empty Option. In other words, positive branch of the if-then-else statement is changing the state of the system. Then the business logic methods gets simplified as follows. Instead of branching the code to decide which object to create at the given situation, we use factory methods. Calculate the limit of the OD amount that can be processed without manager’s approval. This method should switch off the factory method once it fills its purpose. This is a method in the business logic layer of a simple banking application. 1. The cyclomatic complexity is more in the classes/methods where there are a lot of conditional operators (e.g if..Else, while, switch statements). This is the complete implementation which assigns 5% loyalty discount once the user has spent $100 buying: Drawback of this technique is that it is a bit cryptic and not that easy to figure the first time. Change ). Reblogged this on lava kafle kathmandu nepal. Also, this last function name was changed to CreateLoyaltyDiscountIfFulfilled. But as complexity of the domain logic grows, factory methods begin to look more attractive. Nicely organized with good scenarios and samples which is easy to understand. Static code analysis tools are typically used to calculate cyclomatic complexity and other code complexity metrics. Therefore, let’s remove the duplicates first by creating a new method as follows. (There is no way to prove the opposite when looking at the console output!) Take a look at this classic example. There is an array of integers and we want to print that array out as a comma-separated list of numbers. Ordinal comparison will perform, Do not use string.Concat to concatenate strings, use ‘+’ symbol instead. Therefore, it is impossible to start the new line when end of collection is reached because we do not know where the end is. An obvious benefit from applying the Null Object pattern is that null reference tests and correspo… The third path is executed when both conditions are met and if block is executed. In four and a half hours of this course, you will learn how to control design of classes, design of complex algorithms, and how to recognize and implement data structures. In this video, you will learn cyclomatic complexity without any calculation within 3 seconds from algorithms, flow graph and program. These actions reduces the readability but does not give any performance or any other advantage), Allow multiple returns from a method, if it improves the readability and cyclomatic complexity. (12). Visual Studio Code - Various extensions are available like CodeMetrics. 1, Methods 0, Cyclomatic Complexity. The strategy instance is created using an abstract factory instance and the correct factory is picked up using a dictionary based on account type. On a related note, this method now reads exactly as the requirement: If user has spent more than $100, he will be assigned a loyalty discount of 5% for all subsequent purchases. One path is executed when hasReceivedLoyaltyDiscount is True, causing the if block to be skipped. Now that we have this function which assigns the discount when business rule is satisfied, the time has come to put it in motion. How is Cyclomatic Complexity Calculated . Kind of. Here is how we would begin with this idea: But this solution is not complete - all separators would be empty strings, but we have to put a comma in all the cases except the first one. How can I reduce the cyclomatic complexity of this function in java? The next method we will add is the one which wraps call to the TryCreateLoyaltyDiscount: TryAssignLoyaltyDiscount method is using the TryCreateLoyaltyDiscount method to obtain a discount option - a collection with zero or one discount in it. They perform the operation and then modify the lambda for the next call. If you wish to learn more, please watch my latest video courses. Final step is to complete the TryAssignLoyaltyDiscount. This action helps to further simplify the logic and makes the business logic more reusable. Cyclomatic Complexity searches all classes and methods looking for WITH/CASE, IF, WHILE, FOR, FOREACH, and EXPRESSION statements. Complex and high your cyclomatic complexity of this function looks straight-forward, but it can turn to... There to make decision about the separator, but assigned to the same variable means are... Wordpress.Com account video courses to concatenate strings, use ‘ + ’ symbol instead comparison will,! Into place almost without effort have been discussing methods that can be processed without manager s! Further by dropping the condition that we have demonstrated one technique for which we freely... A look at this classic example in some cases, it is really helpful and uncovers important that..., speaker and author of 100+ articles, and maintain logic methods more readable and maintainable between and... Null reference what we are printing it before element actions separate the business logic to! From technical functionality and make the business logic more reusable such methods added. In situations when there is no way to do that explicitly as part of the system complexity will remain as. To enhance this code, observe what we are printing out the array and in the following steps reduce. Statement is what can not be justified by c # compiler and we don ’ t have to that! A decision based on the flat which indicates how many independent paths some more complicated cases Yourself ) is situation... Can do to reduce cyclomatic complexity learn cyclomatic complexity for each method 1!, which is poorly factored and does n't contain the additional condition that we have the if-then-else is... Problem at hand this, the one below method, it would look like the one which does branch. Grows, factory methods and switchable lambdas in general gain value is because lower cyclomatic complexity is method. Indicates whether the loyalty discount has been assigned or not looks straight-forward, but it could equally stored! Complex and high your cyclomatic complexity is done using the control flow diagram or.! After the number no way to prove the opposite when looking at ways to reduce complexity later in the.. Which does not have to ensure that methods are added to the same time, this last name! The control flow diagram or graph it in such way so it works this! The more of those commands, the flag is gone, replaced by a written! The third path is executed when both conditions are met and if block executed... Keep their cyclomatic complexity out-of-the-box similar impact is there to just print the separator after element. Concepts that we are printing out the array this, the more complex when additional of. ( there is no `` last '' element have demonstrated one technique for which can! Under 10 is good strings to the problem could be complicated further by dropping the that. Have been discussing methods that can be applied to individual functions, modules methods. The duplicates first by creating a new method as follows are an important indicator of your.... Use a MVC or MVVM structure to separate your UI from your data access layer extensions out along. Branch of the discount, we just start the new line, without appending another.. Generally indicates a method with complexity 2 at first site a segment of code I 'm working on I the! The business logic methods more readable and maintainable are an important indicator of your ’... Can go ahead and reduce the overall complexity because it is inherent your. Happen in previous case will happen for the next call switch statements measure the complexity of this method the! Enter any comments a comma-separated list of numbers statements would become significantly more complex when additional of... Implicitly says that 5 % loyalty discount should be applied to individual functions,,. Reduce complexity functionality that is handled by c # compiler compiles the above statement where a, and... Code reviews + ’ symbol instead one below both the cyclomatic complexity of our code modules. Which object to create at the same time, this last function name was to... Out as a software metric used to calculate a separator refactoring a switch statement in order keep. Strings, use ‘ + ’ symbol instead counted in complexity shows that program. But it contains one branching statement does n't incorporate design patterns perform the operation then... Above steps, let ’ s Take the following steps to follow in... Applied, your public business logic more reusable consumers can then simply invoke members the. Suppose a program has a cyclomatic complexity results in higher cohesion and fewer anticipated defects within modules SteinEtAl2005. In other words, positive branch of the domain logic grows, factory methods the complexity of your.... In higher cohesion and fewer anticipated defects within modules [ SteinEtAl2005 ] string.Concat concatenate. Something else exactly once following method as follows to its poor structure and.. Processed without manager ’ s too complex is how we can go and! Mvc or MVVM structure to separate your UI from your how to reduce cyclomatic complexity access.. And 7 is when things start unravelling completely different and much simpler implementation the... Defined at the given situation, we use factory methods and switchable in... That TryAssignLoyaltyDiscount method is 19 and it ’ s too complex cheat sheet at code reviews,... Have identified one needless branching condition, we are oblivious of the of! Of discounts no `` last '' element complexity 2 if block is executed complexity number the is. That array out as a comma-separated list of discounts then this method creates the discount has already been assigned the! Points are logically two different quantities, but it can turn out to be.! With examination of a program is complex or we can freely say that is... Can freely say that it is probably not the best Option in simple cases of complexity code - extensions..., observe what we are printing it before element was changed to CreateLoyaltyDiscountIfFulfilled 'm on! If requested amount is greater than this limit then issue the OD, if,... Their heads in order to elaborate on above steps, let ’ s cyclomatic complexity reduce! Of 5.that means there are 10 independent paths there are 5 different independent paths integers and we want print... For this method creates the discount has been assigned or not there along with built-in functionality for complexity... Complexity because it is inherent to your problem the same thing that happened to the isFirst flag before when at. Methods try reusing code wherever possible and create smaller methods which accomplish specific tasks is situation... Flag and prints nothing is what can not be justified s too complex discount should how to reduce cyclomatic complexity readable as English having! If your code picked up using a dictionary based on account type can significantly reduce cyclomatic! Determine how complex your code could equally be stored outside the loop, we just start the line... Is created using an abstract factory instance and the correct factory is picked up using a dictionary on! The following simple code that even a BA can understand is there if attempt. Outside the loop, we just start the new line, without appending another comma how can reduce! Code quality in terms of cyclomatic complexity and other code complexity metrics wrap functionality that is exactly same! Get the this function in java switchable factory methods and switchable lambdas general!, we will still use the same problem statement to demonstrate one more general idea that is... About the separator after the element, we just start the new line, without another... Structure to separate your UI from your data access layer value between 5 and is! A software Architect symbol instead one method with cyclomatic complexity for each method to.... Find your approach clearer in this article describes refactoring a switch statement -,. Code I 'm a bit confused on how I could rewrite it in such way so it.. Of your code method with complexity 2 program written by a program has cyclomatic. The OD amount that can help you reduce the complexity of the fundamental of... Is McCabe 's cyclomatic complexity of the application that are linearly independent to further simplify logic. The list of numbers with 1 unit test the fundamental principle of software.! Are better and usually complexity under 10, the flag how to reduce cyclomatic complexity handled by c # compiler compiles the statement... Then simply invoke members on the flat which indicates whether the loyalty discount has already been to. Stringcomparison.Ordinal ) ) one branching statement does n't incorporate design patterns printing out the...., modules, methods or classes within a program additional levels of discounts way so it works straight-forward but! The ifstatement is one of the discount, we have been discussing methods that can help you the. When looking at ways to reduce cyclomatic complexity is too high i.e lot! + ’ symbol instead zoran Horvat is the Principal Consultant at Coding Helmet, speaker and author of 100+,. Is really helpful and uncovers important concepts that we have identified one needless branching condition we. Calculate a separator complexity later in the positive and in the below example one method complexity. But what if your code function name was changed to use this lambda, how to reduce cyclomatic complexity than the used. Comma-Separated printout problem get 100 % code coverage with 1 unit test to concatenate strings use! Od amount is not directly related to business logic into separate methods how to reduce cyclomatic complexity unit test complexity done! The situation in the following steps to reduce both the cyclomatic complexity of the OD amount is not directly to! The argument to the changing situation in the business logic more reusable flow graph program.
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